Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fcb8246ca3764d5…

MALICIOUS

PDF

71.5 KB Created: 2021-01-03 12:38:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 0493f263b5da2a247b5d7cab4f6ad3de SHA-1: c1f2a4bdfba8c213997b24bad4f3bce10368cf6e SHA-256: 2fcb8246ca3764d5a4b7b3428e7e16d9c5a22a3a8ff757f04b17f75e0196854e
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are hosted on disposable domains or link farms, indicating a likely SEO spam or phishing campaign. The document's content, though partially obfuscated, suggests a lure related to credit reports. The presence of embedded URLs and the ML classifier's high confidence score support the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/aws?utm_term=reporte+buro+de+credito+para+empresas PDF link annotation
    • https://mapupuvegov.weebly.com/uploads/1/3/4/7/134712300/jobix.pdfIn PDF document text
    • https://vabuxijipureg.weebly.com/uploads/1/3/4/4/134476882/jegusu-pozinozetazak.pdfIn PDF document text
    • https://gatodewa.weebly.com/uploads/1/3/4/6/134627503/11c4b2e6b48983.pdfIn PDF document text
    • https://mavixozumag.weebly.com/uploads/1/3/4/8/134891478/d6b2c.pdfIn PDF document text
    • https://dupasaku.weebly.com/uploads/1/3/4/2/134235895/nogatonel.pdfIn PDF document text
    • https://taruzabob.weebly.com/uploads/1/3/4/4/134493447/majaputevelila.pdfIn PDF document text
    • https://kurasapar.weebly.com/uploads/1/3/4/9/134902571/56f04a684d.pdfIn PDF document text
    • https://nenawobu.weebly.com/uploads/1/3/4/1/134131353/8516be.pdfIn PDF document text
    • https://nujamoxe.weebly.com/uploads/1/3/4/2/134234607/4933561.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/82887134951.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/park_my_car_unblocked_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7158eb82-b50d-4f73-84ac-be576ef411cf/linkmenu_ezerai_2_etapas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea4e6e72-9640-4604-b760-2ca2fb497b21/ludinuzapetomo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54e793f7-4cc4-49c1-b544-88b0c9196906/lego_batman_beyond_gotham_free_android_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/801732bf-0cea-4d00-bd84-0a42cc8b1588/49028525520.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/xodemarotetazeno.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_off0000d831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD831 5336 bytes
SHA-256: f0417ce2b8ff71feefacb97925f430e84e09cc6271e02cd57b204fda411890dc
font_01_sfnt_off0000ea38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA38 11392 bytes
SHA-256: c18346517baf718334fdfbf63727eb80bf8ddee261c2eeff2823c7a4bbe47f4a

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