Malicious PDF — malware analysis report

Static analysis result for SHA-256 290769c00cc1db67…

MALICIOUS

PDF

65.7 KB Created: 2020-11-14 16:01:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 083d36e612f919a84d35eeaf25b16496 SHA-1: d3c3d49722e23475ae1073eea64f7f60bbcfb8ac SHA-256: 290769c00cc1db67ef32b32f67980241fd2f57b6d1336f4ea0e9c8d55a47cb15
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or SEO manipulation tactic. The embedded URL 'https://trafficel.ru/123?utm_term=hunter+x+core+manual+portugues' indicates a potential phishing or traffic redirection attempt. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, possibly to drive traffic to malicious sites or distribute further malware.

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://trafficel.ru/123?utm_term=hunter+x+core+manual+portugues PDF link annotation
    • https://mivijupa.weebly.com/uploads/1/3/4/5/134578330/libivapomawufet.pdfIn PDF document text
    • https://wukemurorafol.weebly.com/uploads/1/3/4/3/134338373/85734ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470545/normal_5faf87c8d9e61.pdfIn PDF document text
    • https://jiketajaw.weebly.com/uploads/1/3/4/4/134464131/63f27e78c.pdfIn PDF document text
    • https://vudexomitimezi.weebly.com/uploads/1/3/4/7/134717123/mored-levuj-gegefusolon-lukifosazesi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372080/normal_5f92455ce959d.pdfIn PDF document text
    • https://samomalekadoj.weebly.com/uploads/1/3/1/4/131438786/c9c9da607f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388178/normal_5f8fde06d6776.pdfIn PDF document text
    • https://papazutizo.weebly.com/uploads/1/3/4/4/134467207/kokitavab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371248/normal_5f959e02b5f8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404725/normal_5f9b6ac34d8a1.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/f9cef69d-794a-43f5-b737-99de2f500704/dubuxoxokibexigeroj.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/android_espresso_recyclerview_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50689857-4576-4b25-b09a-d28c8492e8dc/pojadozovi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3142edf6-adf3-4475-bb3f-856a44ae3f0b/19851863262.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/absceso_pulmonar_epidemiologia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a3917a8-cdfc-4ef6-b542-6e4a601f38b0/rozozalepajofipesatepate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4333cb4a-986c-42cd-9822-7307f99adc0c/hp_pavilion_dv2000_drivers_for_windows_7_64_bit.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_off0000c15c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC15C 5280 bytes
SHA-256: 9da02901fe56288438354d04da286c1f56b7f23fce7637ecefd301c3c009a1dd
font_01_sfnt_off0000d33f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD33F 12284 bytes
SHA-256: 8398d3b3b18af81f53c66800f4c8949e9bae8867a4c62ec2da57bfa2892a9ac2