Malicious PDF — malware analysis report

Static analysis result for SHA-256 72e7f27e27bcba14…

MALICIOUS

PDF

81.5 KB Created: 2021-02-19 22:13:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: aa0dc32ffc842b6e9a3acb64c7ea7414 SHA-1: c7d6505a0d43031787f7421af9d668795e7f914a SHA-256: 72e7f27e27bcba142665837bfc8cc683b0f13ef5a345446e6686d9f48cffa7e6
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many pointing to disposable domains, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

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://baarspo.ru/strik?utm_term=the+whipping+boy+novel+study PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4417140/normal_60049799eb232.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462073/normal_6012ce99bcc15.pdfIn PDF document text
    • https://cdn.sqhk.co/vujalenan/c5jhxLF/12698823452.pdfIn PDF document text
    • https://cdn.sqhk.co/xefijumu/VjbTnib/pamerokijaninamu.pdfIn PDF document text
    • http://cocobuka3.xyz/scorched_earth_cave_locationsum42m.pdfIn PDF document text
    • https://cdn.sqhk.co/fapulatonupe/jgC4k5X/ryan_solomon_ninja_warrior_baby.pdfIn PDF document text
    • https://cdn.sqhk.co/jigekuragige/Ygigg65/nopog.pdfIn PDF document text
    • https://jubipolofolexi.weebly.com/uploads/1/3/2/3/132302872/zafog_mozazibirax_difuzusak.pdfIn PDF document text
    • https://jogelobob.weebly.com/uploads/1/3/5/9/135961552/zulapa-bibemexebala.pdfIn PDF document text
    • https://cdn.sqhk.co/gobejilu/Cwrjejh/stack_sheet_free_robux_roblominer.pdfIn PDF document text
    • http://makamar.online/mix_colors_to_make_sky_bluetxvl8.pdfIn PDF document text
    • https://dapalirodo.weebly.com/uploads/1/3/1/4/131483520/5e02cac917e1f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nowaginog.epizy.com/bulgarian_phonetic_tastatur.pdfIn PDF document text
    • http://jaxarafepemu.epizy.com/basketball_stars_game_hack.pdfIn PDF document text
    • http://guxajez.rf.gd/best_guided_meditation_podcast_spotify.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_off0000fec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC6 5260 bytes
SHA-256: d04df6a6f0cd28cdba54551d2f503a8428af6adf1fd01ed7c77d21f9ee4cfa46
font_01_sfnt_off000110c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C7 11868 bytes
SHA-256: 64ddc02ef0a693ef32e99c33b7b14f22871b084688692010e177ea7f6b37ab76

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