Malicious PDF — malware analysis report

Static analysis result for SHA-256 f829b726fff6123c…

MALICIOUS

PDF

76.3 KB Created: 2021-06-15 11:29:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1be08a38e5390591e9879b414528c634 SHA-1: e9fad674127261a1355a08b4062823cec6d2110e SHA-256: f829b726fff6123ca9970707ba4a9c841208d187ed29ca31346b3431204627f9
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of embedded external links, suggesting it's part of a link farm designed to manipulate search engine results or redirect users to malicious sites. The primary URL found, 'https://smidgel.ru/pbw?utm_term=manikarnika+full+movie+in+tamil+isaimini', appears to be a lure for potentially harmful content.

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://smidgel.ru/pbw?utm_term=manikarnika+full+movie+in+tamil+isaimini PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426941/normal_6002056f94087.pdfIn PDF document text
    • https://lubafotet.weebly.com/uploads/1/3/1/3/131380208/kogatolaxikojud-nozilivalur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478667/normal_6065d854959d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499351/normal_603c4116cc829.pdfIn PDF document text
    • https://nagaleburanab.weebly.com/uploads/1/3/4/3/134379557/3706828.pdfIn PDF document text
    • https://bizutimuja.weebly.com/uploads/1/3/3/9/133999747/zimuxirigefu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478393/normal_5fe7a68a52188.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473622/normal_6029989744fa0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368736/normal_5fede9ef3c5b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496592/normal_6023f4b45baf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379848/normal_5fe7076052404.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443578/normal_5ff4c6e303e88.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496571/normal_5fffb91ecd98b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402706/normal_5ff92cdf61724.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://kefimazusob.pbworks.com/f/geworewi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85927819-4ac4-4b45-bdb6-67c5898daa73/pekisonupanonulufit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48d89f56-1c5f-4daa-8bbc-eb10a184fa48/tabela_cid_completa_2020_excel.pdfIn PDF document text
    • http://jugakob.pbworks.com/f/code_for_filmora9_to_remove_watermark.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9ec638a-1a3f-4815-80df-77f7a5aba55f/4362195499.pdfIn PDF document text
    • http://namebitepu.pbworks.com/f/sunucu_bu_dosyay_indirmeye_izniniz_olmadn_sylyor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/346da542-bec3-4809-965b-fe35e623fd5c/wigitomitakoluvu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD840 5044 bytes
SHA-256: 5ccfc75f8fa46e140521fd817c893845488d243e54f3bab9089eb0e01446252a
font_01_sfnt_off0000e967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE967 7216 bytes
SHA-256: 92fbc0af901a02c50086460cf2d6fdc52bcdb4f714a32613517614440a4da410
font_02_sfnt_off0000fe24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE24 11272 bytes
SHA-256: 06764ffa4900a2013811810bdfa36623a918dee40a8bd1264c2090027c372823