Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0122d3db03f2a64…

MALICIOUS

PDF

40.1 KB Created: 2020-10-29 19:03:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 45da58f2b73cc8ee0a552ea63003c552 SHA-1: ecd72d92fb51712b5f5c3393af0f5dffa3393677 SHA-256: f0122d3db03f2a64b48fe247221525009d825031a7316842d9cc99818ee63d77
214 Risk Score

Malware Insights

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

The PDF contains a link farm and redirects to a known malicious URL, indicating a phishing or scam attempt. The document body itself contains the malicious URL, suggesting it's intended to be clicked. The presence of numerous links to other PDFs, some benign and some unknown, suggests a tactic to obscure the malicious redirector within a larger set of links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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/aws?keyword=capm+exam+prep+rita+mulcahy+pdf In PDF document text
    • https://niresofet.weebly.com/uploads/1/3/2/6/132682193/5f6f336dc68.pdfIn PDF document text
    • https://pinonomobeberex.weebly.com/uploads/1/3/4/3/134318871/6f1abb87634c9.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/4edfc2244f3b.pdfIn PDF document text
    • https://leruzifu.weebly.com/uploads/1/3/2/3/132302941/8041904.pdfIn PDF document text
    • https://xufiwelak.weebly.com/uploads/1/3/1/1/131164558/lirata.pdfIn PDF document text
    • https://netaxodesu.weebly.com/uploads/1/3/4/3/134367037/fivopobeno.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7434/7693/files/florida_non_disclosure_agreement.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8293/2936/files/young_life_sin_talk_outline.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29ee5bba-8ac1-4c37-8f81-863fd0f5cbcf/bugopidijoxulupomiz.pdfIn PDF document text
    • https://s3.amazonaws.com/vezosoluvezoj/gm_part_number_identification.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/calvary_s_love_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9623/4902/files/62831747159.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/43596326243.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/059456d3-4016-448e-83eb-cbd9be96922e/54297858842.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/u_boat_owners_workshop_manual.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_off00005cc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC8 5292 bytes
SHA-256: 72f1c08376b19080ac26bc4e4f44334c96f694ce3c4487bda3a07c2afbedfe67
font_01_sfnt_off00006ea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA8 10944 bytes
SHA-256: 80891ac6673f1adc5c10f44cc07daac827ec12e4c300290ec77c701fc2117c8d