Malicious PDF — malware analysis report

Static analysis result for SHA-256 e76647219e118128…

MALICIOUS

PDF

73.3 KB Created: 2021-03-19 18:52:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 209e77bd9837ad17a445d662d281af14 SHA-1: 6d4ea6c43ca9e8b0c53dfc2cc2c3351c8c9f5f38 SHA-256: e76647219e11812861a7e520720388c5bc9badd1d9ba7c3cf0789f3ddca398c7
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. The document body, though heavily obfuscated, appears to contain metadata related to an alarm system manual, likely serving as a lure to direct users to these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://golowaki.ru/wix?keyword=simon+2+alarm+system+manual PDF link annotation
    • https://lugiwitowux.weebly.com/uploads/1/3/4/6/134679166/pogaduve_kodavi_visugotorak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470524/normal_602000c2486dd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498404/normal_5feb3d3220639.pdfIn PDF document text
    • https://cdn.sqhk.co/liwewajawab/Zvhchiw/rusanepivop.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/8KiiDsF/weird_and_funny_facts_about_me.pdfIn PDF document text
    • https://cdn.sqhk.co/minutakumu/ujj4FHx/4097815699.pdfIn PDF document text
    • https://bafexobis.weebly.com/uploads/1/3/4/0/134041027/047b8e0743c2185.pdfIn PDF document text
    • https://ralunudedosamot.weebly.com/uploads/1/3/4/8/134856058/vodivalerexuxux-xizitimojaw.pdfIn PDF document text
    • https://wasatetokis.weebly.com/uploads/1/3/4/5/134513062/pojorilol_vimefowosofirav_vokapuwajoz_texowusejapato.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393503/normal_5fe0ec14d64ee.pdfIn PDF document text
    • https://xipurewaxo.weebly.com/uploads/1/3/4/7/134759043/6492874.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407729/normal_603dfbda27392.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvonusebex/heichih/turomavuwoborejofalaz.pdfIn PDF document text
    • https://cdn.sqhk.co/jozojonujaj/wjh8Chd/65081583906.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://71e5fc8e-cc9a-4633-96c3-2c70acd464d0.filesusr.com/ugd/f08e01_1926518ea9c447c88d4c2c44ebb4dbd3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wujixus/mofezufojikirexavigajoze.pdfIn PDF document text
    • https://d3dd75b0-514a-4dbf-a1f7-973a5b421fb1.filesusr.com/ugd/5b46ec_7c9d8a28ab0144f5a93de109771be662.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gapivegek/97789357491.pdfIn PDF document text
    • https://5e54824a-8208-41b0-8aeb-7c017e8cfb46.filesusr.com/ugd/f64db8_949ba3f949a1471690f900d0c72269c2.pdf?index=trueIn PDF document text
    • https://042e50b4-45d0-4577-915a-c14d43ab21ad.filesusr.com/ugd/18f527_ae290e1fd4f74845bd9a82e63ecb9971.pdf?index=trueIn PDF document text
    • https://ff19a39e-637c-4fc6-80cc-750024e8dd37.filesusr.com/ugd/d217e2_f037547083724408b7d0875d8d2774a7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gimisorixosu/creative_mind_map_template_for_powerpoint_free.pdfIn PDF document text
    • https://3dcfbd4a-ef33-49dc-a04a-0aaf5307c30d.filesusr.com/ugd/b47706_242b0373eec147cba1f78b270269abb9.pdf?index=trueIn PDF document text
    • https://65f7c47b-6fa2-4aed-9649-637438a88329.filesusr.com/ugd/8fb471_c00d55732d7c43758b950abdf39e1af1.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e32e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32E 5168 bytes
SHA-256: 546ff703d359bc66d3040868941b1def93ed928826205008e6e92a1cfa552677
font_01_sfnt_off0000f4ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AB 10228 bytes
SHA-256: de6b7e437b8d5adec9215abeaa3683e7c6dff3b4d215b3bd19f1d8014be82959

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