Malicious PDF — malware analysis report

Static analysis result for SHA-256 492014da04474272…

MALICIOUS

PDF

99.7 KB Created: 2021-05-23 11:03:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 21f3694a0c8fe324eb79eba85a54d651 SHA-1: 2178ec9f4ba6ca59e900f223dcf3e48ad81a7bef SHA-256: 492014da04474272da98873e36b2ca02617520037d025b02d6d7bc90e74413fc
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The embedded URL 'https://gimoguvi.ru/strik?utm_term=how+to+fake+iphone+call+log' indicates a potential lure related to faking call logs, possibly for social engineering or fraud. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://gimoguvi.ru/strik?utm_term=how+to+fake+iphone+call+log PDF link annotation
    • https://tidukefawa.weebly.com/uploads/1/3/4/8/134851120/nilipebafepuvitowe.pdfIn PDF document text
    • https://xowunaxevome.weebly.com/uploads/1/3/4/6/134679103/raguvokafuxeb.pdfIn PDF document text
    • https://levunabul.weebly.com/uploads/1/3/1/4/131407164/fikikemurus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380384/normal_602eb4f10e5ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391024/normal_60318aa463fb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368238/normal_6065afa9bf3b4.pdfIn PDF document text
    • https://bojebunu.weebly.com/uploads/1/3/0/7/130775379/6063621.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491410/normal_605aaee58b5f2.pdfIn PDF document text
    • https://fagowegegex.weebly.com/uploads/1/3/5/3/135315381/rosizakesuvejumemube.pdfIn PDF document text
    • https://juzubuju.weebly.com/uploads/1/3/4/7/134703155/3766246.pdfIn PDF document text
    • https://fadexawotizetav.weebly.com/uploads/1/3/4/3/134339615/sedavuweje.pdfIn PDF document text
    • https://gubijebe.weebly.com/uploads/1/3/1/4/131483267/46da7ea6a2484d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465151/normal_6039decc00075.pdfIn PDF document text
    • https://xaxuxogupovugid.weebly.com/uploads/1/3/0/8/130874119/mukubibibobobukeli.pdfIn PDF document text
    • https://jobawanajofuru.weebly.com/uploads/1/3/4/0/134042661/3278440.pdfIn PDF document text
    • https://zigajimimokok.weebly.com/uploads/1/3/1/3/131383588/fikatilujarikawi.pdfIn PDF document text
    • https://xatuguje.weebly.com/uploads/1/3/1/8/131856293/surutuwotaki-rupexew-nofumafobi.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/1d5a1ffe-0218-4d01-9868-81d5ad7e449c/how_to_clean_epson_print_head_manually.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bb10ad8-8493-42ae-92ab-7d0fb0385028/10124115921.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3ad1345-dc4a-4869-a91b-9c9001c47598/amazing_grace_my_chains_are_gone_chords_pentatonix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd08481e-901f-404f-95b8-1e94cc12415a/month_to_month_lease_bad_credit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8bdce9f-9797-43e0-9982-3573cfdc3158/dadidoburavogoros.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_off000145d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145D7 5120 bytes
SHA-256: 5d4c1c19b9c7260a90ef8d8ef9a923a240c8da92cd5e43f20d38629995443ae7
font_01_sfnt_off00015760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15760 11900 bytes
SHA-256: 6af6a2514b98ad144a8312783ec772042dd903390c3076de01a07354afc4ed1b