Malicious PDF — malware analysis report

Static analysis result for SHA-256 edd2add6684824b4…

MALICIOUS

PDF

78.9 KB Created: 2021-03-28 14:03:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3c62d2df1eaf585fe97b8a4742af7bda SHA-1: d7213570cb91a486bec17e3190177e75e149a1fb SHA-256: edd2add6684824b4db9df674febea6eb4c4be94aa46bb087e915005f57ee7167
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/strik?utm_term=liftmaster+la+500 PDF link annotation
    • https://besajiti.weebly.com/uploads/1/3/1/8/131856076/5940912.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483623/normal_603ccbe7789a7.pdfIn PDF document text
    • http://mutuseki.22web.org/42791922459.pdfIn PDF document text
    • https://cdn.sqhk.co/jomububorava/s0ghejj/97881424408.pdfIn PDF document text
    • http://tacfitproducts.com/tezepurapalalrleve.pdfIn PDF document text
    • http://usacreditmonitoring.info/rusudadevieearg.pdfIn PDF document text
    • https://kirewigofe.weebly.com/uploads/1/3/4/3/134382955/6152359.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383805/normal_603f5418b3511.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368767/normal_601fa077adffb.pdfIn PDF document text
    • https://cdn.sqhk.co/seponidozit/gifiigh/35561952073.pdfIn PDF document text
    • https://gadikidaju.weebly.com/uploads/1/3/1/3/131379663/8351337.pdfIn PDF document text
    • https://cdn.sqhk.co/kafosine/Gid3hgc/sobisawitatuzitusefuzum.pdfIn PDF document text
    • http://about-fb-support.com/pioneer_sx_950_vintage_receiverhemgx.pdfIn PDF document text
    • http://classicalnaturally.com/94661924040rec2h.pdfIn PDF document text
    • http://tixshopclub.space/sig_sauer_p238_magazine_disassembly84cue.pdfIn PDF document text
    • https://cdn.sqhk.co/tevotapomow/hcjaha9/mod_minecraft_1._16._3_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379733/normal_6042e1d0da80f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406208/normal_5fe66b5345f99.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lorajazibosiner.epizy.com/matlab_multivariate_normal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d79fff68-2f10-495b-aab5-1bdda4762017/garmin_gps_72_price.pdfIn PDF document text
    • http://lugetobuzisufa.rf.gd/all_of_me_piano_sheet_music_piano_guys.pdfIn PDF document text
    • http://xamudakosenezi.rf.gd/8049196348.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba53ee28-729a-43c1-ab80-22943dfb05b9/jutakijeziwetunizufetuf.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_off0000f542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF542 5120 bytes
SHA-256: 3b8028f812050ca06bea92e1bcb6ed54c5d48cae59c964695d1cca3e15bdc6e3
font_01_sfnt_off0001069a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1069A 11240 bytes
SHA-256: e2f5568092c3168eda6bc5a3eac677c7582473ab92bd8da7bccfb82a10e74e62

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