Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6975e774c91d0f1…

MALICIOUS

PDF

69.0 KB Created: 2021-09-29 04:19:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 883469d9812c0dead223ea6a069463b4 SHA-1: 6dd80745e5f42f283471209815b97c3e01bbd90e SHA-256: e6975e774c91d0f17c79361b0da6ea0ae78f051e1781506c8acf1217472bba41
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. The PDF_IMAGE_LURE heuristic indicates it uses an image-based approach with a clickable action, likely to redirect users to external URLs. Numerous URLs were extracted, many pointing to compromised CMS upload directories, suggesting a distribution network for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://laborke.ru/uplcv?utm_term=escape+from+alcatraz+english+subtitles PDF link annotation
    • https://sdhouse.info/ckfinder/userfiles/files/21230385965.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/64570193946.pdfIn PDF document text
    • https://tempatpasang.com/contents/files/21906895557.pdfIn PDF document text
    • http://www.toptehnik.si/images/laladobuwekojubat.pdfIn PDF document text
    • http://agenziaimmobiliarecannavo.eu/userfiles/files/gevigu.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/12641285261.pdfIn PDF document text
    • https://triangle-electronics.com/assets/userfiles/file/54171623425.pdfIn PDF document text
    • https://htchninc.com/d/files/12666757388.pdfIn PDF document text
    • http://kqcme.yiaiwang.com.cn/upload/files/25402633655.pdfIn PDF document text
    • http://karat-dobremiasto.pl/userfiles/file/xarupuboxamizazejena.pdfIn PDF document text
    • https://ngusacdon.com/upload/files/51095922615.pdfIn PDF document text
    • http://architettotamborra.eu/userfiles/files/mafakajipulidobak.pdfIn PDF document text
    • https://asiquim.com/ckfinder/userfiles/files/28969657544.pdfIn PDF document text
    • http://usateatop.com/_upload/files/63556315837.pdfIn PDF document text
    • http://indecomavo.pl/userimg/inc/1954784501.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16151d1fb88023---58301152120.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/bj6qer6s1ltdri4kd4963osiu2/55784115976.pdfIn PDF document text
    • http://ux-school.ru/files/files/89005849801.pdfIn PDF document text
    • https://istanbularicilikfestivali.com/upload/ckfinder/files/zoxukos.pdfIn PDF document text
    • https://istanajp2.com/contents/files/20634099756.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16140701f101ef---rofebuzabarulotijilerimub.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/38146077999.pdfIn PDF document text
    • http://kapalishakti.com/ckfinder/userfiles/files/12089793161.pdfIn PDF document text
    • http://nicolalazzarotto.com/userfiles/files/rabumamenofaxojavi.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/d3ce81be297b717e6952e07463eab1aa/62520817100.pdfIn PDF document text
    • 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_off0000afd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFD9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c7eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7EB 14700 bytes
SHA-256: 93bd8709d412434c04b006253e7f3800224dd6eedbf4f41f466ac0bf400fe87a
font_02_sfnt_off0000ec52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC52 11208 bytes
SHA-256: 6414f89427b1c0cbfaed8ee5b2a131d96f9427b6c4076d2a12914d180d402517

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