Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d93e5e1b120fcc1…

MALICIOUS

PDF

103.5 KB Created: 2021-03-19 19:09:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 326fb9ef7700b03d4a4990e76eff51e1 SHA-1: 9975ae92476c758b284ea5962c70691b33a641c9 SHA-256: 8d93e5e1b120fcc176d9b185a40d5ee0a24627aaa33307df1fef2ac3ab6c83fd
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 0.9997

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/award?keyword=bagan+temple+map+pdf PDF link annotation
    • https://panusefebile.weebly.com/uploads/1/3/5/3/135331690/dejizuvegexi.pdfIn PDF document text
    • http://sufekuxuxujaw.iblogger.org/21055992169.pdfIn PDF document text
    • http://sipipewawezizuf.getenjoyment.net/bixanatanagutewijuzarokik.pdfIn PDF document text
    • http://bonmarket.site/monster_energy_4_pack_pricedu3f8.pdfIn PDF document text
    • http://scrlt.xyz/47397569752v6hic.pdfIn PDF document text
    • https://finamiwowekizo.weebly.com/uploads/1/3/2/3/132302732/e83062a8c3fc.pdfIn PDF document text
    • http://twirlini.com/kimusavoci091.pdfIn PDF document text
    • http://desepevadijowu.22web.org/criminal_case_mod_apk_rexdl.pdfIn PDF document text
    • https://gilurumujeluzem.weebly.com/uploads/1/3/1/8/131857598/d70dd414.pdfIn PDF document text
    • https://xuvesebitewetok.weebly.com/uploads/1/3/6/0/136086761/06c5961670b20.pdfIn PDF document text
    • https://divuvefa.weebly.com/uploads/1/3/4/7/134759037/zeserajalofotamepaz.pdfIn PDF document text
    • http://varnisvakq.ru/albinismo_oculocutneoc4c4d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bobixupeto.myartsonline.com/xarinigujarudolutime.pdfIn PDF document text
    • http://vovojoj.atwebpages.com/78379332734.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/buku_aristoteles_politik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a8d0e0f-cffb-473f-b919-ad946bb842aa/canoscan_lide_220_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97312086-a05f-4b6a-9f18-a68543124c33/char_broil_red_grill_2_burner.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/is_freecad_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c568441e-3e2d-449f-ada2-ffccb4e129f3/acer_laptop_battery_price_in_bd.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/punjab_university_b_tech_admission_form_online.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://scripts.sil.orgIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000140c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140C1 5136 bytes
SHA-256: b8631db8a5d5282226a8708e3161929dd38661b41c6b08b2273f71213c5fde52
font_01_sfnt_off00015231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15231 12880 bytes
SHA-256: f6d6e2791b161c88332f8ea03356ea17e3cb30eacfe87a9a1ce0cabc770a93fc
font_02_sfnt_off00017b87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B87 6828 bytes
SHA-256: 29bb1a9576c2387a62322f299bd8ba4257fede5cfe99bfd36037fc60b563e72b

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