Malicious PDF — malware analysis report

Static analysis result for SHA-256 63004d41cb249b4b…

MALICIOUS

PDF

45.2 KB Created: 2020-08-19 23:24:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca2cecb132f36d0c8bbeff98a625820c SHA-1: 3cc39da0b5be724dff4f276f470728fadae78719 SHA-256: 63004d41cb249b4b1c5445fe493f09456f1889708ae76fa7e9ffe8303021aeff
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector URL, suggesting a phishing or scam attempt. The document body, though obfuscated, contains text related to 'Fema ics 100 hcb answers' and the malicious URL, indicating a lure to a potentially harmful site. The presence of numerous PDF links and a critical redirector heuristic confirms the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://ttraff.cc/pify?keyword=fema+ics+100+hcb+answers
    • http://files.starboycreations.com/uploads/1/3/2/6/132695829/bb6b9b194be758.pdf
    • http://files.mygwbc.org/uploads/1/3/1/3/131384635/numawesak.pdf
    • http://files.dgchallenges.com/uploads/1/3/0/9/130969801/184e84.pdf
    • http://tobalosu.njccsresearch.com/uploads/1/3/1/6/131606490/siligujiduvis.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/4913/9880/files/kilidudumifid.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8428/files/nuzaposebitagitiwuxelolo.pdf
    • https://cdn.shopify.com/s/files/1/0440/4733/5574/files/holes_anatomy_and_physiology.pdf
    • https://cdn.shopify.com/s/files/1/0462/8440/6944/files/cheminformatics_tools_slideshare.pdf
    • https://cdn.shopify.com/s/files/1/0429/9777/6543/files/zifibiponisisuzavag.pdf
    • https://cdn.shopify.com/s/files/1/0432/1679/7855/files/1536303735.pdf
    • https://cdn.shopify.com/s/files/1/0432/6857/1299/files/subojupoxogidujavegupez.pdf
    • https://cdn.shopify.com/s/files/1/0429/9322/1783/files/jidapaviretomujegepomip.pdf
    • https://cdn.shopify.com/s/files/1/0437/8846/8376/files/86223999307.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073c1.bin
5b022271ccf344534211c57462e447807830f4df0ce5bc75ccd423b61b74c668
pdf-font-stream PDF embedded font (sfnt) at offset 0x73C1 5388 bytes
font_01_sfnt_off00008604.bin
8680066310c5fdef00721cf39473b642abd9db307d7bb603d84979c58a16139f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8604 10140 bytes