Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b9e043b408d2ff3…

MALICIOUS

PDF

74.6 KB Created: 2021-05-31 23:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 8c35c93e454d0810e0185df2dfd5918d SHA-1: c0f7df8c73af57dcc7ad4d147ec59eb91449b08d SHA-256: 9b9e043b408d2ff3aa0e597f1894d9d05c51ef125381bc2ae02e379d441266bf
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm used for SEO manipulation or to distribute further malicious content. The primary external URL points to a page related to garage door keypads, likely a lure to entice users to click through.

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://queure.ru/pbw?utm_term=how+to+replace+battery+in+genie+garage+door+keypad PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4446283/normal_5ffcc24706cf9.pdfIn PDF document text
    • https://lutividagij.weebly.com/uploads/1/3/4/8/134896544/tofavikol.pdfIn PDF document text
    • https://junanopawakeza.weebly.com/uploads/1/3/3/9/133999625/ea248a.pdfIn PDF document text
    • https://kodidenub.weebly.com/uploads/1/3/4/3/134328035/likamunubifi.pdfIn PDF document text
    • https://nifimesatixat.weebly.com/uploads/1/3/4/6/134668674/e5cd4bee7f1d.pdfIn PDF document text
    • https://regezubigif.weebly.com/uploads/1/3/5/3/135320660/1247851.pdfIn PDF document text
    • https://funovupudejo.weebly.com/uploads/1/3/4/4/134473131/ruzijowerowoto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502248/normal_5fd377f964e46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387040/normal_602222b19f135.pdfIn PDF document text
    • https://gibawimeviz.weebly.com/uploads/1/3/5/3/135348906/2168912.pdfIn PDF document text
    • https://minaraxu.weebly.com/uploads/1/3/4/7/134765114/3790176.pdfIn PDF document text
    • https://tiwabegi.weebly.com/uploads/1/3/0/8/130874513/7c5606931c9fce5.pdfIn PDF document text
    • https://durapafived.weebly.com/uploads/1/3/1/4/131438767/1855166.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/18d93dff-a8ad-4d40-b224-def27f2593dd/63045555277.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/978394cd-cf79-4948-adfa-a18198c4fb74/how_to_use_gopro_hero_4_as_webcam_without_hdmi.pdfIn PDF document text
    • http://sizolasipape.pbworks.com/w/file/fetch/144411396/gexibewuzudofijuxob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad4b13e4-f736-4999-a640-b0dc7f315692/pros_and_cons_of_mixed_economy_system.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b1614cb-da74-4787-a3e7-66bd3f07330e/digitech_vocal_300_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac809555-324d-4d25-8f0b-df17aeccdb7f/94243060613.pdfIn PDF document text
    • http://xalanupuzewo.pbworks.com/w/file/fetch/144423477/varuzutonasediwunufakaj.pdfIn PDF document text
    • http://mumasenekera.pbworks.com/w/file/fetch/144417657/biduf.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_off0000e1ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1EA 5420 bytes
SHA-256: dd500aaa616d63dbd3176849e1fe3fb4e5a9c7864aa697dddbc6847c56cbc198
font_01_sfnt_off0000f47b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47B 12476 bytes
SHA-256: 0232e5e7637c824367266b412c4e412f65d204818f4e5900ac412ee8ba9b3f23