Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1049ced6aedd3bd…

MALICIOUS

PDF

86.5 KB Created: 2021-06-25 23:24:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 42bcb7476f40c593133e27871e0cdbec SHA-1: d432b9196d7816f0ec66373e7bd6eef65edd2b57 SHA-256: d1049ced6aedd3bd8e4838fd1c6c33ec9887f6afcd7671c64d52eaf7b14210f8
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of an advance-fee scam. It contains numerous links to external sites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a phishing or malware distribution infrastructure. Although no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a malicious intent to deceive the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 http://akgikorea.com/file_upload/fck_upfile/file/64697936481.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f93bfd690b---55297156142.pdf
    • http://acecaalcoy.com/userfiles/file/50053555099.pdf
    • http://secohthailand.com/file_media/file_image/file/voluvazorom.pdf
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b026f69a7b7---gelijam.pdf
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/16093f78846505---66918821221.pdf
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1606e538e62a91---56047444834.pdf
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd4dc3b585d---92057509686.pdf
    • http://sjhrz.com/images/upload/File/nezipugibilutibodisimu.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/frhs0jhnr52srpum5in2jmc7ns/30301037333.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/qhtkojavpmc2qoo284j30hs8e7/zapijukimogutuxafirezom.pdf
    • http://tnslib.net/userfiles/files/nalobamusudafojerimul.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d71191e627---70198627868.pdf
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/po5ae3rp2o0l65tei45vnom9es/juxalutozi.pdf
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/2u24i1rcc8m0kinnb28utfjjab/76081316429.pdf
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ccce1e99e02---zoluwir.pdf
    • http://katachizu.com/img/news/files/46339859378.pdf
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084c20803e05---99588035397.pdf
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1607cfac16a11a---pelowoferelari.pdf
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2748e382ee---perurunidam.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a69df979496---54049141136.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160776bf132531---40261467040.pdf
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/7fvqvklnis9s2i4lpgo8lrmdmq/37710456953.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=how+to+cook+sipo+egg
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f06a.bin
2637284de37258d8782be1c143a782c4345227ec339562adffc7fdd4f9fae436
pdf-font-stream PDF embedded font (sfnt) at offset 0xF06A 17268 bytes
font_01_sfnt_off00011c25.bin
9e03938565ba534728990de1df8ef28cdd19e692f847fc66fc243a168e85f099
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C25 10304 bytes
font_02_sfnt_off00013395.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13395 16792 bytes