Malicious PDF — malware analysis report

Static analysis result for SHA-256 2901b4d1410635e8…

MALICIOUS

PDF

71.3 KB Created: 2021-02-16 13:57:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 74abe14aeb35d08b1eecda4ad858d3df SHA-1: dab7e8d8b8e1b3d03e37bc8f49ca51c7a458f73c SHA-256: 2901b4d1410635e8d42b998b419157c38f5c40516208a6dd158877759927e262
214 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure and a PDF SEO link farm. The presence of numerous external links, including one to a known malicious domain, suggests a phishing or spamming campaign. While no scripts were explicitly extracted, the PDF structure and link farm indicate an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=pmp+exam+prep+rita+mulcahy+8th+edition In PDF document text
    • https://jazelisis.weebly.com/uploads/1/3/4/8/134870131/gaforevu_debuzezum.pdfIn PDF document text
    • https://kusikulovaledif.weebly.com/uploads/1/3/1/6/131606813/e38f7ad53.pdfIn PDF document text
    • https://putoluvutawubu.weebly.com/uploads/1/3/1/4/131437806/8c680.pdfIn PDF document text
    • https://nakojuxipesasam.weebly.com/uploads/1/3/0/7/130776326/8d961c61238c.pdfIn PDF document text
    • https://pusenosate.weebly.com/uploads/1/3/5/3/135347115/9417315.pdfIn PDF document text
    • https://sejixegagetuta.weebly.com/uploads/1/3/0/9/130969850/gesamovepa.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://s3.amazonaws.com/ravuxudibure/66815865689.pdfIn PDF document text
    • http://kasanuvuwa.epizy.com/pegufebubem.pdfIn PDF document text
    • http://virilos.epizy.com/belajar_bahasa_jepang_premium_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/serire.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/zebepiwafotixajud.pdfIn PDF document text
    • http://razebilevugimu.epizy.com/80176869340.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/80068396416.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/fiscal_responsibility_and_budget_management_committee_report.pdfIn PDF document text
    • http://dinopug.epizy.com/fccla_planning_process_template.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/62644331621.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/carnival_party_invitation_template_free_printable.pdfIn PDF document text
    • http://rupeguv.epizy.com/phonetic_transcription_worksheets_with_answers.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8A7 5384 bytes
SHA-256: cfdc1806c793777469282c2f9b67232a3541e945ebbe3bde7e5489c30024c638
font_01_sfnt_off0000dad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD2 11016 bytes
SHA-256: 2befc9a098afd548c4813b4d1aa700cdb1cc22937d8ffe947f7bd6a847ed3eb0
font_02_sfnt_off00010029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10029 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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