Malicious PDF — malware analysis report

Static analysis result for SHA-256 dda2751dfdd619a7…

MALICIOUS

PDF

106.3 KB Created: 2021-09-01 07:51:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4365158b06490c010a6dbd223cccea50 SHA-1: e13bc11429599111222abfe2b929712b1105aedc SHA-256: dda2751dfdd619a7b53ffa1b4c48bc96ac306b64b98badec91cdae043908763e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of an advance-fee scam, likely luring victims with promises of prizes or parcels requiring payment. The presence of numerous links to compromised CMS upload storage and disposable hosting suggests an attempt to distribute malicious content or phish for credentials. Although no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly indicate malicious intent, likely involving embedded exploits or malicious JavaScript.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/6d62evqnga0gje60reqhv452v3/18156512597.pdf In PDF document text
    • http://finemetal-cn.com/upload/files/55548943972.pdfIn PDF document text
    • http://noxsun.com/jingkelun/userfiles/files/20210531045944.pdfIn PDF document text
    • https://newtop-eg.com/userfiles/file/tusujiduverupogor.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/f90a252d01f5682990f9c3fbb3484a81/belasalobujogamubiwukuje.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083cd57937a9---29837782304.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/m05df61l3ccje5j345ni84jl1h/12689121609.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b99350d974e---waxitarud.pdfIn PDF document text
    • http://bannermaul.com/userData/board/file/7992201615.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160759c0cc63b3---dizomolo.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/38995ef38ebdd02fe5dcff2a86729abc/60820305930.pdfIn PDF document text
    • http://mallenmediations.com/mallenmediations/images/userfiles/file/dixubabajunexitigemi.pdfIn PDF document text
    • https://giasidaily.com/uploads/userfiles/file/gomarumuritawew.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae7b538a4f8---26038560505.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/d0ccf0d6043da0c808f3dc051549ac83/48860666310.pdfIn PDF document text
    • http://askort.pl/Upload/file/63118762832.pdfIn PDF document text
    • http://adbuffalony.com/uploads/files/33267988042.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/33312503919.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608b50a990f05---94777690690.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/169906aa918a4500dd122f1adb4e6964/70173918045.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd06796b60---nuwotuzogivugomekijo.pdfIn PDF document text
    • https://misbahelmudii.org/ckfinder/userfiles/files/gagelakaxinedegemelukat.pdfIn PDF document text
    • http://neoneofytou.com/ckfinder/userfiles/files/84902097758.pdfIn PDF document text
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1c2b60140---20709704949.pdfIn PDF document text
    • http://xn--j1aii.su/userfiles/file/noganuvuwagewiliz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=crossroads+rv+owners+manualPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000138e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138E5 10500 bytes
SHA-256: 8e725c8dfeabe8e581fce815824fdc230b4410f579b229745bc9bd3348683516
font_01_sfnt_off000150d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000168e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168E8 18892 bytes
SHA-256: 792d93b45d40bb41f1a27667af7a7351e9ffee80ae2fe7afea5ee293037e4701

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