Malicious PDF — malware analysis report

Static analysis result for SHA-256 d45a3b28bc91982f…

MALICIOUS

PDF

80.8 KB Created: 2021-03-14 16:55:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 606f7a537c1275a4de087ed098d6dad2 SHA-1: 9de5326a005a36b83ace95bc9c33ae6a6845afb0 SHA-256: d45a3b28bc91982f3f24b90501ac168c78f93cc9331c7b01ab6c2716ad312702
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to disposable hosting and are indicative of a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/wix?keyword=roblox+troll+ids+2019 PDF link annotation
    • http://blognews.top/excel_macro_to_add_sheets_and_renamen0nkx.pdfIn PDF document text
    • http://idealicait.website/almanac_of_business_and_industrial_financial_ratios6y01q.pdfIn PDF document text
    • https://xufujakuzizam.weebly.com/uploads/1/3/5/3/135315974/vebifogumuxogotatazi.pdfIn PDF document text
    • https://zepukuliro.weebly.com/uploads/1/3/5/9/135964459/8276759e16.pdfIn PDF document text
    • https://jonimewogil.weebly.com/uploads/1/3/1/8/131860125/6776ca49fd7bfc.pdfIn PDF document text
    • http://kumorepo.22web.org/gamecube_emulator_android_apk.pdfIn PDF document text
    • http://yblda.fun/xaxobezovepapowaxalbr.pdfIn PDF document text
    • https://lareduna.weebly.com/uploads/1/3/1/4/131453109/470726.pdfIn PDF document text
    • http://uablog.site/86353070654bs9v0.pdfIn PDF document text
    • https://sorunamupojiwek.weebly.com/uploads/1/3/1/4/131407183/966a055.pdfIn PDF document text
    • https://fogunovavak.weebly.com/uploads/1/3/2/6/132681822/3356b2a31f777.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wonenuw.epizy.com/tebaxen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85f34f25-eafc-4ded-b4c3-7372f683cb5f/rowom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c61cc54e-897f-43c0-bde6-076654ae7299/what_is_vector_addition_in_physics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f14ceb5-8138-4c3e-8315-638785097d84/40332453841.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/deda645e-9156-4db8-8dac-e4fe96f480ce/how_to_set_temperature_on_a_whirlpool_refrigerator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e02ae26a-6aeb-413e-8fee-1d90b7bb9e4e/who_has_read_48_laws_of_power.pdfIn PDF document text
    • http://givonomiruf.rf.gd/bayesian_information_criterion_negative.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d4691e2-f942-424b-a23e-03014ed7d417/36832833084.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37be6ac9-c3e2-484c-86dc-d64501590ffb/49766089197.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF126 5308 bytes
SHA-256: 4577ecf7ab929ce4f4d4abfaa5760a2f2a6fa83eeb78b883a68780c04b37af98
font_01_sfnt_off00010340.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10340 2388 bytes
SHA-256: a4789b3a3b0819bccc23546344bafa49cbef9659e21e2740b4f533ceed407ad4
font_02_sfnt_off00010dfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFC 11940 bytes
SHA-256: ee52f4ca51e4fb64b23cfd05e08e29f8f4a6d48c08bb76a84f71419bffcb1015