Malicious PDF — malware analysis report

Static analysis result for SHA-256 178fad1bd5a0b150…

MALICIOUS

PDF

87.1 KB Created: 2021-03-10 00:30:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 68783d79b67d356e1c6eecee754d54f6 SHA-1: 6d780bf1ace12c089d5d5de1c596345235f9c5c2 SHA-256: 178fad1bd5a0b150fadb6f5031f6af9593233106c1c747458e589f8a9ddbde8f
186 Risk Score

Malware Insights

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

This PDF file was detected 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 domains, suggesting a link farm designed to distribute malware or lead users to phishing sites. The document body, though partially corrupted, suggests a lure related to academic materials, specifically a 'soapstone graphic organizer for rhetorical analysis answers key'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mezovuduw.ru/wix?keyword=soapstone+graphic+organizer+for+rhetorical+analysis+answers+key PDF link annotation
    • http://hellesypakk.online/lapawiganmi9ur.pdfIn PDF document text
    • https://cdn.sqhk.co/wepiwojeta/cLjiVgj/robikobusux.pdfIn PDF document text
    • https://xavexipaw.weebly.com/uploads/1/3/1/6/131636683/ee86d78e8b8.pdfIn PDF document text
    • http://vojemodipu.sportsontheweb.net/62259859205.pdfIn PDF document text
    • http://jsexj.fun/63667713275ptndv.pdfIn PDF document text
    • https://bodumiwi.weebly.com/uploads/1/3/1/4/131406735/9018547.pdfIn PDF document text
    • https://junobinedutuki.weebly.com/uploads/1/3/2/7/132712306/gavusalag.pdfIn PDF document text
    • https://cdn.sqhk.co/benadujeju/ggqge1c/powuxokimavuw.pdfIn PDF document text
    • https://cdn.sqhk.co/rinovizifim/hbhcghC/bujebowowu.pdfIn PDF document text
    • https://molisepav.weebly.com/uploads/1/3/5/3/135347716/kamikomazawixew_jonuvobikozike_nugenemugojimoz.pdfIn PDF document text
    • https://gererojakomez.weebly.com/uploads/1/3/1/1/131163960/suxeduvi-sevolanibem-zegusobogafuset-dogudewa.pdfIn PDF document text
    • http://clientesdkb.com/diamond_infinite_edge_string_specsj6uw9.pdfIn PDF document text
    • http://fresh-ita.fun/tupowaxazeniehelt.pdfIn PDF document text
    • https://guretaximijogu.weebly.com/uploads/1/3/0/7/130739376/82dd46f76.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c9b0c9dc-51ad-46ec-84b2-dbc26df53712.filesusr.com/ugd/b6f588_08e9a1c233bf47ffa96bdb661009ab97.pdf?index=trueIn PDF document text
    • https://89e5ed4a-33eb-42a6-b5f1-9fc07ea1e15b.filesusr.com/ugd/ff68bb_05f2ef133ad24f36854505c026bf366b.pdf?index=trueIn PDF document text
    • http://kuxemozoxabonag.onlinewebshop.net/manual_of_the_planes_1e.pdfIn PDF document text
    • https://02ee9779-94d6-4ec7-959f-c0f99fe19a35.filesusr.com/ugd/cdc607_47ce6de0b0ae4af98cc8d3c74bb36dc1.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_off0001173a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1173A 5688 bytes
SHA-256: 91eaf6a33906dab6e5e6250f55c639e78c0df3c33118f2e79a02deabef90bc25
font_01_sfnt_off00012ab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AB5 10700 bytes
SHA-256: c897f2106916a1f98309ee9d8f5a54e1032a2f4783421207a39cea2a7cef23d8

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