Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d0bbf846951b16e…

MALICIOUS

PDF

91.3 KB Created: 2021-03-09 21:46:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 954258d52c6102ed6589eab066796598 SHA-1: e5d505453bfc8f59c65275571a88ef2edd8f40b8 SHA-256: 7d0bbf846951b16ea231041be287e9f20585ce528ff65dcc30c125db8d48e12e
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing trojan. It contains numerous external URIs, many of which point to disposable domains and are likely part of a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, suggests a lure related to an ebook download, which is a common phishing tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/strik?utm_term=dsp+first+second+edition+ebook PDF link annotation
    • https://cdn.sqhk.co/jetobatu/jhjfkjd/burewedorateradajokeziwiv.pdfIn PDF document text
    • http://teksol.xyz/sybil_2007_sub_indofsh1e.pdfIn PDF document text
    • http://idealicaufficiale.website/podatorilogovokegiwuzo74ac.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/5Edhcgi/77970586567.pdfIn PDF document text
    • https://gewujamagig.weebly.com/uploads/1/3/5/3/135339218/butoxal.pdfIn PDF document text
    • http://goldotzyv.ru/qualitative_and_quantitative_research_method_examplesgh5c8.pdfIn PDF document text
    • http://2gusevshop.space/8691299675kjxtg.pdfIn PDF document text
    • http://vurapajojijare.22web.org/the_silence_of_the_lambs_movie_script.pdfIn PDF document text
    • https://cdn.sqhk.co/jepipovi/g5hiAgd/43098344374.pdfIn PDF document text
    • https://tonituligavu.weebly.com/uploads/1/3/4/8/134884188/b1353.pdfIn PDF document text
    • https://vijekufimukij.weebly.com/uploads/1/3/0/9/130969895/fobalusowoxov-zebub-dawabuneloxilir-sopuxa.pdfIn PDF document text
    • http://reduslimitalia-official.site/139930824184s0nh.pdfIn PDF document text
    • https://cdn.sqhk.co/vujaderaz/he8ihhI/9_months_pregnant_belly_looks_smaller.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f0ab200-3f51-4ff8-9716-eb82eb4a5c4e/75745654403.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad290986-6bab-4e58-876a-7ebe14ca5276/40893482773.pdfIn PDF document text
    • http://tikolikenugim.epizy.com/75976640672.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28b773ca-65e5-411b-b02e-dafd9fc8c009/gapizamilijugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85a478b9-4957-45ae-868b-a175a66c6eb0/dirt_devil_featherlite_vacuum_bags.pdfIn PDF document text
    • http://jigosip.epizy.com/55208415188.pdfIn PDF document text
    • http://bikawojesagoso.rf.gd/27476970019.pdfIn PDF document text
    • https://f4b9ed98-44c1-44e6-9966-d9817cd43de7.filesusr.com/ugd/9ced5d_814a2c5621214b2d99add4fbc4960ed4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd244a6f-9fe1-42d1-8e28-5f54503cef94/ruzes.pdfIn PDF document text
    • https://9a89a7da-ede3-42eb-a537-7416be21eb2d.filesusr.com/ugd/aaaf79_6b2ed28981df4cd982863652407c3165.pdf?index=trueIn PDF document text
    • http://gilukukifetebin.epizy.com/autocad_software_requirements.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011fef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FEF 5112 bytes
SHA-256: 06dc078261518843bb33ed010704531ef1eefb37aa1bc665a44723a9df7acdef
font_01_sfnt_off00013169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13169 13956 bytes
SHA-256: 5460988c8da2728f55fd4bcc970cbc84abdf23512eb082a473ec06236a29455d

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