Malicious PDF — malware analysis report

Static analysis result for SHA-256 af500b481fd504a5…

MALICIOUS

PDF

80.9 KB Created: 2021-05-30 07:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 37cb912dfe4ef9c5c6eea2b7cf4b77ef SHA-1: 97b68bc516fb50728cde7f86f6760f1cf027436e SHA-256: af500b481fd504a528f3f7d83fdfdd75d6bb6bfbd3cb3e4745b7d528df7fbbf4
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to be a lure related to resetting car stereo Bluetooth settings, directing users to external URLs like 'https://bologen.ru/strik?utm_term=how+to+reset+bluetooth+on+pioneer+avh-210ex'. No scripts were extracted, but the PDF structure and link farm indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/strik?utm_term=how+to+reset+bluetooth+on+pioneer+avh-210ex PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387046/normal_60417dc0d6087.pdfIn PDF document text
    • https://dizarikovir.weebly.com/uploads/1/3/4/6/134627165/a4c1925f62.pdfIn PDF document text
    • https://kitetunevoneg.weebly.com/uploads/1/3/4/7/134703129/fuvamojopidor_dovefilid.pdfIn PDF document text
    • https://xuvunigito.weebly.com/uploads/1/3/1/1/131164310/puvonivamosizu.pdfIn PDF document text
    • https://zejewovelopitut.weebly.com/uploads/1/3/0/8/130813539/5132bd1.pdfIn PDF document text
    • https://ginuzakonufa.weebly.com/uploads/1/3/2/6/132681862/167876.pdfIn PDF document text
    • https://dawugagulinejud.weebly.com/uploads/1/3/4/3/134368664/2c5dd.pdfIn PDF document text
    • https://sirazetagur.weebly.com/uploads/1/3/5/3/135328448/212c289262e.pdfIn PDF document text
    • https://nefitajufu.weebly.com/uploads/1/3/4/7/134712437/eb273be00d833e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449177/normal_601d68166adab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393020/normal_600e250d3c4e2.pdfIn PDF document text
    • https://gejizataki.weebly.com/uploads/1/3/3/9/133997606/8ba182d03.pdfIn PDF document text
    • https://teguvazotumeli.weebly.com/uploads/1/3/4/0/134041540/5f7180bbc561.pdfIn PDF document text
    • https://tojuseviru.weebly.com/uploads/1/3/4/5/134513446/bobopakubenot_mimipige.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/923cdbe8-6fee-406b-9678-f6608e8cd942/wedirobez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fce39151-c87b-4f15-aaba-a7679b6cc852/kitchen_pro_breadmaker_k6745s.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0693e00-60d0-45c8-b0d4-48c11c5252bd/23384543513.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dedc4609-2aa7-4c50-8319-0f464af61b8e/what_is_the_most_accurate_translation_of_the_bible.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7134f033-59fe-4315-b5b9-644345000d8b/fifty_shades_darker_download_movie_dual_audio_480p_450mb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bde3cfa2-bbe1-4f72-b16e-e41a48d7f969/diferencias_entre_las_bases_nitrogenadas_purinas_y_pirimidinas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2467202-111d-4fe6-b25d-0bf775cd48a9/barodalemagilinogeweviv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e92b6f5-eabf-4a9d-9e0e-2bd0d5dddc34/pentax_k3_manual_lens.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_off0000f97f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97F 5588 bytes
SHA-256: e5e3731e2d647a4bcf839241586a0dc24cccffd62a4cf50c29027a83e643675b
font_01_sfnt_off00010c91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C91 12436 bytes
SHA-256: 848849369f796424230763b521a2e24f03d3d4e2d66576afe66c1f1f7ee8a24a

Open this report in the interactive analyzer, or submit your own file for analysis.