Malicious PDF — malware analysis report

Static analysis result for SHA-256 5088933a9831989e…

MALICIOUS

PDF

168.7 KB Created: 2021-04-06 05:04:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f8780c7dcdefcb9d6be7d3aceb4d3b97 SHA-1: b1776ad1be875129c94ee9502ed847470d4dc44a SHA-256: 5088933a9831989eb6d6e8bcdd11fda7e8c8a56909a17a8e5eb56565c190606e
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 0.9988

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://pelibifir.ru/award?keyword=impact+of+celebrity+endorsement+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374710/normal_602ad5089c044.pdfIn PDF document text
    • https://rezibaxuxemabu.weebly.com/uploads/1/3/1/4/131453555/xexiwuju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501503/normal_5fd7c478eccb3.pdfIn PDF document text
    • https://zigudufojivop.weebly.com/uploads/1/3/4/7/134718002/jogafuxugede-tinax-kavizemol-jupoduvan.pdfIn PDF document text
    • http://wowit.pro/how_do_you_send_a_private_tweet_to_someone4z24b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383321/normal_60660ebbefa53.pdfIn PDF document text
    • http://blue-tick-central.com/tijomivisavodakip5pg1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481061/normal_5ffa07d731973.pdfIn PDF document text
    • https://balejumefem.weebly.com/uploads/1/3/0/8/130814467/jefevurikujol_winawidefogiz_rulewijeduxas.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://uploads.strikinglycdn.com/files/3dd234af-8987-4410-916c-319be13f379e/98093728820.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e5e6ac1-b8c3-4f60-b97f-2e8cec62958f/how_to_reprogram_a_marantec_keypad.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/ashton_irwin_superbloom_album.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb1d8725-8d39-4d70-bf18-426f6fb5f2ea/can_you_get_a_psychology_degree_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26e60055-67aa-4893-a5ef-3d18451c2bbe/nanobobabegibalugipebi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee8c8050-cc83-4131-a162-ff8b30f51edf/g-shock_rangeman_gw-9400bj-1jf.pdfIn PDF document text
    • https://s3.amazonaws.com/petubapizo/cub_cadet_ltx_1042_kw_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73caef10-efe2-436f-85a6-98d4ffb68588/voice_warm_up.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a94621a3-1a6b-4eee-b0e9-a2e3a177ad9d/45944551551.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001e343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E343 30468 bytes
SHA-256: c025e5114e3f7175b80d8c440111780cdce4ec8e618de17f2fea129d1f2eee8f
font_01_sfnt_off0002418a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2418A 5268 bytes
SHA-256: 9c0c3c7e086d842521ef33c5337f5207f5241b162e5aef41ae3c1382d568eaf5
font_02_sfnt_off00025347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25347 16948 bytes
SHA-256: 47e95fddfd54bfa08bce0a671a3ecf014101653e0ec7c886ddf6bd03577a0d32
font_03_sfnt_off000283a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x283A7 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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