Malicious PDF — malware analysis report

Static analysis result for SHA-256 965029173d885d04…

MALICIOUS

PDF

66.5 KB Created: 2020-12-21 13:00:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: e2a5de893676d2cc927bfaf698c0bb3a SHA-1: eccbfd936089a7e7d71922fe97fe35b8718c3c52 SHA-256: 965029173d885d04953261b8c7f22b506f8f146d7344227b6a25f31ae95c469b
254 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating malicious redirection and a link farm, with a critical ClamAV detection. The embedded URL points to a known malicious redirector, suggesting the document's purpose is to lead the user to a phishing or malware distribution site. The ML classifier also strongly indicated maliciousness.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://ggtraff.ru/strik?utm_term=parsec+star+wars+error In PDF document text
    • https://cdn-cms.f-static.net/uploads/4471719/normal_5faa644424adf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496001/normal_5fd0e1a9bc453.pdfIn PDF document text
    • https://kedetasogo.weebly.com/uploads/1/3/4/5/134599644/lopifejejakebiv.pdfIn PDF document text
    • https://lipitedo.weebly.com/uploads/1/3/4/3/134380968/83b33dc6861cca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421776/normal_5f97c50d7442f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391605/normal_5fb3e45aacdf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445320/normal_5fa9e7a234c76.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc79e8f02915d4a16f985cc/t/5fc908ea64ddc46789a55682/1607010539026/lasitabevivikudakesure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cc07931-bf5a-4deb-a2f2-32453c75c4d3/air_bud_golden_receiver_trailer.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc718b7f784ea51367e45c4/t/5fd70a73d654060362df69c2/1607928436223/receipt_template_word_doc.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdf246b2dcd53187f20af33/t/5fdf2981e64f5703153798cb/1608460673251/rugopirug.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf49883c02f22b9d035840/1606371721206/kajamuj.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdf246b2dcd53187f20af33/t/5fdf4b0b91828d0f5d56f03d/1608469259238/sword_of_destiny_kaththi_theme.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6adfcbdb33045eeea6878/t/5fd606d3d654060362bd8871/1607861972210/fool_for_you_piano_sheet_music.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdecff9a78e7904f9f9100f/t/5fdedaaf463d3b6c6f405731/1608440496305/75079659205.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_off0000c7f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F5 4852 bytes
SHA-256: 9ad73d703e919b1119c87232c2a993e051cfca51f8e81a5ffd2ab335f4b14871
font_01_sfnt_off0000d894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD894 11036 bytes
SHA-256: d40d08a2a8b59b52bc0bce14b7a9db92117c930e3d9c7a9a7a5c5ec956f0c3ba