Malicious PDF — malware analysis report

Static analysis result for SHA-256 954e799830f67622…

MALICIOUS

PDF

68.9 KB Created: 2021-03-13 13:05:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: d95a5960f54252e25901cea50e95c883 SHA-1: f072bf47a65c7252656ef10f16d79cde135fdbda SHA-256: 954e799830f67622a2742c51f9ba9f152324c5cb4deef677ef2e23833c12832d
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users. The primary URL, https://mezovuduw.ru/wix?keyword=vocab+level+d+unit+8+answers, suggests a lure related to educational content to entice clicks. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or a scam.

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=vocab+level+d+unit+8+answers PDF link annotation
    • https://jakemujilofadam.weebly.com/uploads/1/3/1/3/131380171/jugubawivaludaxufa.pdfIn PDF document text
    • https://rikudebuwixe.weebly.com/uploads/1/3/4/5/134589128/tivozimo.pdfIn PDF document text
    • https://demijejave.weebly.com/uploads/1/3/4/6/134607426/1653607.pdfIn PDF document text
    • https://rovetizewi.weebly.com/uploads/1/3/0/7/130776299/1996663.pdfIn PDF document text
    • http://xofofumireke.mypressonline.com/best_dutch_oven_camping_recipes.pdfIn PDF document text
    • http://xejepurefe.scienceontheweb.net/toyota_camry_xse_for_sale_2018.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366327/normal_602fc31d26b8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471969/normal_5fdc460a60dbb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://47c0d0ed-94e3-447f-940a-e265262d053f.filesusr.com/ugd/a43ec6_542a890dda7b4311861d7614e5c2dd91.pdf?index=trueIn PDF document text
    • http://rotitow.rf.gd/90783601.pdfIn PDF document text
    • https://d23eb412-52e1-45ef-a32a-0c032022daee.filesusr.com/ugd/03485a_e8e3193f68dd4845819cfd6dc4e4fd58.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/wps_brute_force_attack_apk.pdfIn PDF document text
    • https://4a5bfc55-71df-4474-8f3e-9f6aca65c64b.filesusr.com/ugd/29b6ce_b357dea20199420fac2f605369e32221.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/aku_milikmu_malam_ini_felix.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/sunbeam_0.9_cu.ft_microwave_oven_white.pdfIn PDF document text
    • https://e82ff0bd-cb1a-4782-8b92-0a0fb7657660.filesusr.com/ugd/d17951_c81c3e9837e1484a96c5108134a1277c.pdf?index=trueIn PDF document text
    • http://mutomipana.rf.gd/reduce_file_size_online_below_5_mb.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_off0000d0fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0FA 5384 bytes
SHA-256: 61afd7215885bf564c9124d7367c7f87c233c69dee9275da1d5a5b6a3ed2e917
font_01_sfnt_off0000e36a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36A 10412 bytes
SHA-256: ae9aee0c5df462149d734bc9288491313ff65570bf7df28a8d141895e336ebe1

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