Malicious PDF — malware analysis report

Static analysis result for SHA-256 862164a10f034aa9…

MALICIOUS

PDF

73.1 KB Created: 2021-01-06 03:27:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 4f2fdb0084bf7e1a765e559e026c86e0 SHA-1: f52856faebe163342f037e9a82236bfd279b5c3b SHA-256: 862164a10f034aa933a2dd5bc6b69a237e03e76e49f43a8eb4737f99720fe119
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a large number of external links, many of which appear to be part of a link farm designed to obscure the true malicious intent. The primary URL, https://traffset.ru/aws?utm_term=ayesha+jhulka+video+songs, suggests a lure related to popular content to entice clicks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffset.ru/aws?utm_term=ayesha+jhulka+video+songs PDF link annotation
    • https://monowulesamewul.weebly.com/uploads/1/3/2/6/132682048/kidawuxepefozib-sosanu-gefafexomasak-bitod.pdfIn PDF document text
    • https://lofefogurabu.weebly.com/uploads/1/3/1/1/131164054/zopomiburudi-wakefobimo.pdfIn PDF document text
    • https://xakebugus.weebly.com/uploads/1/3/4/0/134018628/31b749.pdfIn PDF document text
    • https://vizakadaji.weebly.com/uploads/1/3/4/4/134491897/vajuwax.pdfIn PDF document text
    • https://ridolagu.weebly.com/uploads/1/3/0/7/130775195/c2b64.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/ifMliiz/61899471338.pdfIn PDF document text
    • https://cdn.sqhk.co/dorejewibiz/cmieCwN/14955590111.pdfIn PDF document text
    • https://wiselorasen.weebly.com/uploads/1/3/0/7/130739143/wemerupamekif.pdfIn PDF document text
    • https://zidefiwemisuj.weebly.com/uploads/1/3/1/6/131606537/13c11.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/xafaxotaful/zokezubawi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13ea26c2-f4a3-4879-9467-ca6ee7224ab7/how_to_download_a_linux_operating_sy.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/destiny_child_uncap_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/54822071136.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/davis_s_drug_guide_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d1df259-5d05-489b-8a1e-b77b693b6a1b/25349367166.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/invite_letter_template_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/swtor_synthweaving_guide_700.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/annual_report_apple_2018.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_off0000df15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF15 5284 bytes
SHA-256: 629700b1e0627a1ea2a7b377f1ed9a4b721ec094d0d9c0ebe870e4d4ad678dae
font_01_sfnt_off0000f11e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11E 11376 bytes
SHA-256: 58ef9243e32619651221084ed6c20f8f2f3464846f42b65de608a9c5474e9458

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