Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f305b06aec70c37…

MALICIOUS

PDF

73.8 KB Created: 2021-06-09 11:04:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9e2a0025f80680292d5ec9bd3964456b SHA-1: 5a4dbbdea7fe95d84cc919f3452179fdd22db4b1 SHA-256: 8f305b06aec70c37d2042c2547caddb24fcd52613b3543efcf43d48adef4be3e
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external links, many hosted on disposable domains, designed to redirect users to other sites. The document body, though partially corrupted, suggests a lure related to a "bee swarm simulator auto farm script", likely a deceptive tactic to encourage clicks. The presence of many external links suggests a potential for distributing further malware or engaging in phishing activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://smidgel.ru/pbw?utm_term=bee+swarm+simulator+auto+farm+script PDF link annotation
    • https://sejujilebenifej.weebly.com/uploads/1/3/4/8/134886687/4827027.pdfIn PDF document text
    • https://gabukoxikala.weebly.com/uploads/1/3/3/9/133997771/421349.pdfIn PDF document text
    • https://duveniwapawas.weebly.com/uploads/1/3/4/2/134265961/904061.pdfIn PDF document text
    • https://xopilujipuwoka.weebly.com/uploads/1/3/4/8/134886601/5b0079a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478415/normal_602d0557e4036.pdfIn PDF document text
    • https://gokejaxax.weebly.com/uploads/1/3/6/0/136056436/1035925.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366306/normal_6041adf56215b.pdfIn PDF document text
    • https://nojupifidupo.weebly.com/uploads/1/3/4/3/134361410/nawirujumezegivujir.pdfIn PDF document text
    • https://guwiretaxuzaji.weebly.com/uploads/1/3/4/6/134687660/kefolefixafube.pdfIn PDF document text
    • https://finibolamojirum.weebly.com/uploads/1/3/5/3/135341575/b78517fbed3811b.pdfIn PDF document text
    • https://musibagufes.weebly.com/uploads/1/3/4/5/134587398/2894814.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478387/normal_603ff54d62e16.pdfIn PDF document text
    • https://kuvolobogon.weebly.com/uploads/1/3/4/0/134012650/jupujig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387706/normal_6067f1eab0a89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376869/normal_604859f0d3b4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392868/normal_60504b8e9ccdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469633/normal_60548b3cea3aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470825/normal_6032643e01a68.pdfIn PDF document text
    • https://magifoxokepo.weebly.com/uploads/1/3/6/0/136053300/rikodazonot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474211/normal_606bd40adc4ff.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lurilimid.pbworks.com/w/file/fetch/144796563/dakujenimenejaxozofara.pdfIn PDF document text
    • http://farejutotej.pbworks.com/w/file/fetch/144798975/how_to_write_a_cover_letter_for_a_phd_application.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_off0000d99e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD99E 5300 bytes
SHA-256: b469ad358fadca6646cc9eb0950cf9535dcecbc6353e5ea395f012a2dd937d04
font_01_sfnt_off0000ebab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAB 19068 bytes
SHA-256: fe644fb161306ff9baecb09c9a4f3327e30d3e7fbf2487d5526be3d5af0214e9