Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee551a0ac7933ab3…

MALICIOUS

PDF

75.7 KB Created: 2021-03-30 19:56:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 3f5d0e5376a6e7b37c8bc5bb3726659b SHA-1: d80195b4a8ea488d7a27c83631cf1426fe0ce60a SHA-256: ee551a0ac7933ab3a34807432501331600e636048dc4058829d51b98b390294f
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The presence of 'Civilization like game android' in the document body and URLs indicates a lure to attract users to potentially malicious content. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

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://ponafet.ru/123?utm_term=civilization+like+game+android PDF link annotation
    • http://apparentlyopt.com/vijafewolikagadomekozulm.pdfIn PDF document text
    • https://derovidexaw.weebly.com/uploads/1/3/1/3/131382126/5351375.pdfIn PDF document text
    • http://cosmicgig.com/momofuku_milk_bar_birthday_cake_truffles_recipe92vj2.pdfIn PDF document text
    • https://netivexis.weebly.com/uploads/1/3/4/0/134042514/4bd467.pdfIn PDF document text
    • https://cdn.sqhk.co/mugetawelumi/ajghi8d/obby_aqua_park_cookie_swirl_roblox_mod.pdfIn PDF document text
    • http://sokfresh.fun/88644274328c1bjs.pdfIn PDF document text
    • https://jetetinabalu.weebly.com/uploads/1/3/2/6/132682142/takedo.pdfIn PDF document text
    • https://novufetus.weebly.com/uploads/1/3/4/1/134131343/3460131.pdfIn PDF document text
    • http://xsale.trade/xifokarogogipi4t3k.pdfIn PDF document text
    • https://wuluvaxezipow.weebly.com/uploads/1/3/5/3/135393263/9450157.pdfIn PDF document text
    • https://gexamamolaro.weebly.com/uploads/1/3/4/6/134640589/fitezepixarugab.pdfIn PDF document text
    • https://latolupolazu.weebly.com/uploads/1/3/4/0/134017494/reginefinuneb.pdfIn PDF document text
    • https://cdn.sqhk.co/dolitife/Lgdgfje/57070149721.pdfIn PDF document text
    • https://cdn.sqhk.co/kuniremolu/jcAhijj/notepad_for_android_apk_download.pdfIn PDF document text
    • https://revevujuz.weebly.com/uploads/1/3/4/6/134678323/poxopipade_juvebejapopok_fupulu_zoval.pdfIn PDF document text
    • https://goxadivitekoze.weebly.com/uploads/1/3/1/4/131437736/05098396b10fbc1.pdfIn PDF document text
    • https://delazodudiz.weebly.com/uploads/1/3/4/5/134591817/59083edab.pdfIn PDF document text
    • http://mamajan.space/652435485418zi0t.pdfIn PDF document text
    • https://didefitelov.weebly.com/uploads/1/3/0/8/130874246/7a199b1915.pdfIn PDF document text
    • https://vipukawolatu.weebly.com/uploads/1/3/4/4/134486161/xunexoxakomose.pdfIn PDF document text
    • https://cdn.sqhk.co/sudagewas/mgfia2s/fasomekev.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://86a6be6f-1c3f-48a2-98e5-8a654ddc1212.filesusr.com/ugd/027f51_75dcea5db0a1417180fe14e11304c0c0.pdf?index=trueIn PDF document text
    • https://2d130471-2a64-48ba-87cf-8f1e86c6acad.filesusr.com/ugd/9c43ec_61d17c650f5e47e1978d0aabfe614901.pdf?index=trueIn PDF document text
    • https://b54663a3-ff9d-4122-b75c-69b71428c9b0.filesusr.com/ugd/cfa91a_36d121a2aa304767b4d130cedb464628.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_off0000ec5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5B 5048 bytes
SHA-256: 3f59c69ca18418d8502681816504bca60b64d6976ae06726cf78f355165166ee
font_01_sfnt_off0000fd7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7D 10476 bytes
SHA-256: 3b71c8847ee916ad8167f883aafb515e6c51f1db16d7c1cb48a3e0617210003e