Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c1130b558e5f4e0…

MALICIOUS

PDF

79.0 KB Created: 2021-03-29 18:20:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3645deab206083b381c48ac765c3794f SHA-1: 95b55c492f841e3ab5d7926f26e17babc6567f56 SHA-256: 9c1130b558e5f4e079d0e4aabafa92c5b39ddf0c1eea580544f312438b3d76fa
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • 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://jottigo.ru/aws?utm_term=gem+of+the+ocean+summary+sparknotes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372378/normal_605bac64922e6.pdfIn PDF document text
    • http://lightstart.xyz/17035687651jiz4j.pdfIn PDF document text
    • http://kefets.xyz/wagner_wood_and_metal_paint_sprayer_w100_-_280w_reviewszjoik.pdfIn PDF document text
    • http://itsnat.space/jozopuvejebaxaga54ygg.pdfIn PDF document text
    • https://wavafawiwex.weebly.com/uploads/1/3/2/8/132815000/zexekexif.pdfIn PDF document text
    • https://bajupeboxima.weebly.com/uploads/1/3/5/3/135327322/4496738.pdfIn PDF document text
    • http://power-guard.shop/chamberlain_universal_garage_door_wireless_keypad_klik2u-p2jq8bp.pdfIn PDF document text
    • https://gupijevud.weebly.com/uploads/1/3/1/4/131407369/4022113.pdfIn PDF document text
    • https://fuwemuwiwogul.weebly.com/uploads/1/3/4/0/134016804/xexevi.pdfIn PDF document text
    • https://kaxepiset.weebly.com/uploads/1/3/2/7/132740291/1124734.pdfIn PDF document text
    • http://ibkreactiva2020.com/is_the_summer_i_turned_pretty_a_moviehlcxo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378605/normal_5fc96829c4f33.pdfIn PDF document text
    • https://gerugufudob.weebly.com/uploads/1/3/4/8/134869234/wadepenadomadis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379240/normal_602949f3a1718.pdfIn PDF document text
    • http://bevatijiwavefad.22web.org/xibagegulekutovol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394079/normal_5ffa93c053096.pdfIn PDF document text
    • https://fuzewero.weebly.com/uploads/1/3/4/3/134393775/6be1422.pdfIn PDF document text
    • http://oneitstore.info/2058426932vx60z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486344/normal_602fff7b4200a.pdfIn PDF document text
    • http://bluebadge-support.com/jubuvazetumixumanurui0knk.pdfIn PDF document text
    • http://twirlini.com/best_hand_planer_2020tfwxj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://beboxunedux.epizy.com/58172889754.pdfIn PDF document text
    • http://pijiwir.rf.gd/budget_preparation_software_free.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_off0000f8e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E7 5420 bytes
SHA-256: a6a9978a9fe1ec3bc1faae0f501d958ee4d47ee2fb264325b4cf9478eccbb4d3
font_01_sfnt_off00010b3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B3B 10432 bytes
SHA-256: 0f3636e496e8926bda05262b5e52bebcc390825b2f9fe125c3a3fdb374202ee4

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