Malicious PDF — malware analysis report

Static analysis result for SHA-256 97cdb63d59380898…

MALICIOUS

PDF

85.5 KB Created: 2021-06-28 11:49:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 89bee28433762ebf84101243bd9c0f03 SHA-1: af3ea84b38578334af112a2eedb77dd8ff83e563 SHA-256: 97cdb63d59380898ee9acc91a9056624533bfd761179fd7ce5ed6db8e521ac75
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of an advance-fee scam. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting an attempt to redirect users to malicious content or download further payloads. The document's structure and heuristic firings strongly indicate a phishing lure related to lotteries or parcel deliveries.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://smidgel.ru/uplcv?utm_term=derivative+of+exponential+function+pdf
    • https://najlepsze-w-polsce.pl/uploads/55441296467.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/b74fb3e1184c2e28bc71fc2739025260/51763081788.pdf
    • https://implant-drill.com/userfiles/file/pesosenaraba.pdf
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/71201f5a877e07a324baa038c0c7b03d/59377488380.pdf
    • http://3qbuy.com/CKEdit/upload/files/49853741712.pdf
    • https://kingdomofgodmn.org/userfiles/files/26780663673.pdf
    • http://sieuthivatlieuhoanthien.com/upload/files/71633002675.pdf
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bf755a87ba6---98473116848.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/bkiqddfdt093bn0j7fq8roh977/9847965686.pdf
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf3ebefd9b---resarexajanimevadomofud.pdf
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/012e68ac80bd87d808f2b030e530694f/91385227646.pdf
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609165cc61d68---kekanapof.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bfcefeb9852---47029981179.pdf
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/piwob.pdf
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160732ee22fee8---94167981882.pdf
    • http://changrung.com/ckfinder/userfiles/files/3435223215.pdf
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/daa55b5234f6235147d32642b2b56f70/1424235879.pdf
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb1b100efd---kusuvevun.pdf
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/hv969u9bg9i7vrsn2nc148ju0i/31140399420.pdf
    • https://cplastik.cz/data/cms/file/37536818735.pdf
    • http://uniquecharacters.com/upload/files/53244296023.pdf
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd179e6657---33350493257.pdf
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/3d66399ede2c9cc392ba9d45b9750c9f/paramogapezuwura.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/4d4cbb3bae323b3211725f43679f296f/7051822377.pdf
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070c07e5d577---19340051599.pdf
    • 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_off0000ea5d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5D 16792 bytes
font_01_sfnt_off0001026f.bin
07d01b30d71fa1048e01f9de3320ecbc81f8753806643425c56fb1a1cef32897
pdf-font-stream PDF embedded font (sfnt) at offset 0x1026F 17324 bytes
font_02_sfnt_off00012fd0.bin
0fcd1fc1f9b888b2794f69f418f15d6bb6fb40b87b981d6568b8a64283a05403
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FD0 10716 bytes