Malicious PDF — malware analysis report

Static analysis result for SHA-256 a228e9dd82a84abd…

MALICIOUS

PDF

84.1 KB Created: 2021-03-24 02:25:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2c8f85e788074f6d330c40761226f1c4 SHA-1: b10b0cec5a47b49e8716bdf2d1e1f32d75f015bc SHA-256: a228e9dd82a84abd0d3d56916d98347d7391c002a717dcce9dff15baa6dfee2c
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a mass external link farm, with many links pointing to disposable hosting, suggesting a SEO manipulation tactic to drive traffic to specific URLs. The primary malicious URL identified is https://ponafet.ru/wix?keyword=injustice+2+apk+mod+menu, which is likely a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/wix?keyword=injustice+2+apk+mod+menu PDF link annotation
    • https://mugibamarenov.weebly.com/uploads/1/3/4/1/134109107/walakivezinetad.pdfIn PDF document text
    • https://nabokopawupanav.weebly.com/uploads/1/3/0/7/130739772/ziduxoxuzidekititu.pdfIn PDF document text
    • https://vujivizu.weebly.com/uploads/1/3/5/3/135305207/7775558.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473030/normal_5fca674c61a69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379030/normal_5fe8077b92c2a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409799/normal_5fe066aacfd60.pdfIn PDF document text
    • https://nedovewa.weebly.com/uploads/1/3/5/3/135316636/8588233.pdfIn PDF document text
    • https://wojaginobaxap.weebly.com/uploads/1/3/1/8/131857211/0095d89c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/votawawo/sir_gawain_and_the_green_knight_middle_english_text_with_facing_translation.pdfIn PDF document text
    • https://332892e0-6a2b-40ad-946e-e7c92c61c867.filesusr.com/ugd/3e5d97_10c4b163ad1a48c1baf6e8d95d13f8f8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb7f0b0a-f775-41de-bb71-8289bd7a598b/69856796594.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff0f0cee-1d4f-4cc9-a58f-e326b8f726d1/53615970478.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00205d75-d922-4fe6-9d22-54c6aba5e580/zuvuroberabekijojimuru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9ffe99d-d869-4dc2-b2f2-53a0fec7b844/fafolarivun.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/the_complete_works_of_aristotle.pdfIn PDF document text
    • https://b3079848-b07e-4d89-9244-05dfa5dd91fe.filesusr.com/ugd/3ab5ed_064c3132eff845388a6f2c83813d975c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/66877685092.pdfIn PDF document text
    • http://gufidom.rf.gd/56103580233.pdfIn PDF document text
    • http://rozasazi.epizy.com/android_animatorset_delay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cded74a-6f8f-492f-bdb8-1adadc6c104b/dunkin_donuts_frozen_drinks_nutrition.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e61f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE61F 5184 bytes
SHA-256: 12ef897afda8fa5e8393a949c8484abe71a16960301a84ee7ef5a78cc5548fe9
font_01_sfnt_off0000f7b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B5 11292 bytes
SHA-256: 7a96e2487d293d8b38a4a31ff8002a3fe5f685e71dc55d2d630b43d3faf8bed3
font_02_sfnt_off00011e6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E6E 16076 bytes
SHA-256: 3088de61ba4d2b01ab234d84e40a42107c4d30a52b1b9bdaf8961d49da71d313
font_03_sfnt_off00013313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13313 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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