Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e8d057a969faaa5…

MALICIOUS

PDF

72.0 KB Created: 2021-06-01 20:23:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8f0ce6a60974454ab813e36f977e2c5c SHA-1: 0effb7c9b4ba64b38665d6d065d3f3df4e5be698 SHA-256: 7e8d057a969faaa5bd7624b1353b818c2060569bcba7271c4e1ffa1508b4a236
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://maypoin.ru/123?utm_term=banjo+full+movie++filmywap PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4449170/normal_5fd6051f0952f.pdfIn PDF document text
    • https://jonukejunuxesa.weebly.com/uploads/1/3/1/4/131409236/2b1f1bac53.pdfIn PDF document text
    • https://gewaxuselez.weebly.com/uploads/1/3/4/2/134265722/8398aa1fa14.pdfIn PDF document text
    • https://jewafime.weebly.com/uploads/1/3/2/6/132681773/edd58cc48d74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500183/normal_60117e067c1f4.pdfIn PDF document text
    • https://zowatiloni.weebly.com/uploads/1/3/0/7/130739934/92d38c8a744.pdfIn PDF document text
    • https://lowonuve.weebly.com/uploads/1/3/4/5/134584544/danelesu.pdfIn PDF document text
    • https://mivezosikobo.weebly.com/uploads/1/3/1/4/131453246/7410796.pdfIn PDF document text
    • https://jowojebutoda.weebly.com/uploads/1/3/4/4/134487303/bd20f.pdfIn PDF document text
    • https://kosazuritejozu.weebly.com/uploads/1/3/0/8/130874521/2576710.pdfIn PDF document text
    • https://bofakodejo.weebly.com/uploads/1/3/4/2/134265658/4e48f.pdfIn PDF document text
    • https://manesufepal.weebly.com/uploads/1/3/1/3/131381078/8082693.pdfIn PDF document text
    • https://zefuriduzowav.weebly.com/uploads/1/3/0/7/130740504/niwetij_ratodojizir_jafadodun_kitamalave.pdfIn PDF document text
    • https://sakedupepig.weebly.com/uploads/1/3/4/3/134355988/zugudelewizorez.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/bccf926b-2b3b-4c28-9480-d1136a363f5b/samsung_j2_pro_theme_store_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd160ec8-0569-4b22-9e4a-fe12721f2d8e/when_did_the_modern_agricultural_revolution_start.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdbfb3e4-c07a-4d18-b3c4-cb13de64a531/tekonsha_prodigy_p2_trailer_brake_controller_review.pdfIn PDF document text
    • http://lebunurivugu.pbworks.com/w/file/fetch/144468501/how_to_make_an_origami_parrot_step_by_step.pdfIn PDF document text
    • http://kipizasuzeda.pbworks.com/w/file/fetch/144414363/samuberu.pdfIn PDF document text
    • http://sajateves.pbworks.com/f/xoxanezakebuj.pdfIn PDF document text
    • http://bilabegape.pbworks.com/w/file/fetch/144442452/biputitoji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50f97982-8cc1-4769-93f3-a029807bd6b0/getipagazamarawe.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_off0000dcbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCBF 5152 bytes
SHA-256: 556cf199dbff3c5ef96a88f1b6fae0fe4e29788f2259da2970bbe981987bc9a8
font_01_sfnt_off0000ee62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE62 10752 bytes
SHA-256: a977b60d0d7efb5df55680e647e899fac2e99b2f0d85cdbdcfca5df3839fa8d4