Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e5e0931c1047346…

MALICIOUS

PDF

75.0 KB Created: 2021-02-20 10:52:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d8c3efb7edbcc228b184ebb62fe910a8 SHA-1: 7553d7f678be4ad16dc17fed64ade6589f228c9a SHA-256: 7e5e0931c1047346ad1eeba3a7b94c449f8355830a64c47c85ecd383dba6a126
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, 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 SEO manipulation tactic. The presence of embedded URLs and the overall structure point towards a phishing or redirection attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/strik?utm_term=eureka+forbes+vacuum+cleaner+service+centre+in+chennai PDF link annotation
    • https://cdn.sqhk.co/xavonepez/yhF3jfc/baby_blue_and_pink_ombre_nails.pdfIn PDF document text
    • https://cdn.sqhk.co/sexuzoropa/hfgfggE/20766674318.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502268/normal_5fe38270a9f0b.pdfIn PDF document text
    • https://bonomomu.weebly.com/uploads/1/3/0/7/130775928/vajiwasepedo-runataxadim.pdfIn PDF document text
    • http://meetsucre.pro/hiring_a_public_room_full_listening_answerhw97g.pdfIn PDF document text
    • https://kukixagunobi.weebly.com/uploads/1/3/5/3/135325453/pumadixunizux_wagegeratugev_vuzimabonuki_wopumofoj.pdfIn PDF document text
    • https://puxibaso.weebly.com/uploads/1/3/0/9/130968956/poxez_xubutuve_zugovutu_gebakaduwejokuj.pdfIn PDF document text
    • http://bestcreditcheck.info/rothys_shoe_size_guidezh2kd.pdfIn PDF document text
    • https://zegotasubevit.weebly.com/uploads/1/3/6/0/136097081/6de7aa720.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496812/normal_5fef88f8a321e.pdfIn PDF document text
    • https://cdn.sqhk.co/tijovomiv/dGjigjh/red_ball_gown_dresses_cheap.pdfIn PDF document text
    • https://cdn.sqhk.co/jisujesox/BgeHjem/nafosu.pdfIn PDF document text
    • https://nasuzezigoma.weebly.com/uploads/1/3/4/5/134587751/kibonefoxupurava.pdfIn PDF document text
    • https://vozupawugenebib.weebly.com/uploads/1/3/0/7/130776609/5071092.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403959/normal_600689ef3928c.pdfIn PDF document text
    • http://negeduji.66ghz.com/bhakta_kumbara_audio_song.pdfIn PDF document text
    • http://se-mrush.com/donation_request_template_freef9c7z.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rixuweba.rf.gd/texas_inshore_fishing_report.pdfIn PDF document text
    • http://taxisariwoboduz.epizy.com/bevifosulimaxobade.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_off0000e7f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F5 5340 bytes
SHA-256: a9a4f16fbd4f3ee336f155c2169d884578ccffb78eedb1d9bcc67ce2924faf3b
font_01_sfnt_off0000fa08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA08 10540 bytes
SHA-256: fd2153f7abc38e3ad5b76f6126b28d0a40ed49e1621104fb5b77b97c42e23d32

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