Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f50242754943df6…

MALICIOUS

PDF

41.7 KB Created: 2020-11-05 19:04:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d51c4a45b3d985335b4f5b67f37338f SHA-1: 74ee55e2282df0617c941056841d33aa3b415b87 SHA-256: 5f50242754943df6b6596306691c59dc4c44603331de2152697cbab32ffcdda5
96 Risk Score

Malware Insights

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

This PDF document was flagged by an ML classifier as malicious. It contains a large number of embedded external links, with one pointing to a URL associated with search engine optimization tactics. The document body, though heavily obfuscated, also contains URLs, suggesting an attempt to redirect the user to potentially malicious websites or to manipulate search engine results.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://trafffe.ru/aws?keyword=goat+simulator+unblocked+games
    • https://fuvipizewovotat.weebly.com/uploads/1/3/1/0/131069886/254307.pdf
    • https://fejegexe.weebly.com/uploads/1/3/4/6/134617501/feranupupobetejijoba.pdf
    • https://gejosabuvin.weebly.com/uploads/1/3/4/4/134457948/dusivibujo-nemotesizodeje.pdf
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/lozar.pdf
    • https://tibiwurab.weebly.com/uploads/1/3/2/6/132695994/7553553.pdf
    • https://cdn-cms.f-static.net/uploads/4366364/normal_5f879c1c8b278.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8a173bec-7e4d-4744-babd-1b4746eb2677/this_will_be_the_day_that_i_die_meaning.pdf
    • https://s3.amazonaws.com/fosawef/las_50_sombras_de_grey_netflix.pdf
    • https://uploads.strikinglycdn.com/files/27f99d79-fa10-435b-8a55-bababd7a771f/55490845642.pdf
    • https://uploads.strikinglycdn.com/files/3175f816-3c5b-4db6-82c8-fce88653f2bf/gewegadoruzemilumugorixe.pdf
    • https://s3.amazonaws.com/nowonovege/20826497496.pdf
    • https://uploads.strikinglycdn.com/files/fb4a2974-c0b9-447f-9f57-34863ffb8324/mizaluzilekitosak.pdf
    • https://s3.amazonaws.com/niporofez/42445341436.pdf
    • https://uploads.strikinglycdn.com/files/9fcb1ba9-b79f-4804-b0cd-a03247eb23bb/28991629923.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7405/files/el_boom_latinoamericano_wikipedia.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_off000065a7.bin
7f877ec8663a96ac10c4dcefbd5b855eefa635942c9107c73cceae263267f758
pdf-font-stream PDF embedded font (sfnt) at offset 0x65A7 5496 bytes
font_01_sfnt_off00007842.bin
28eb1d18ff5cfe9a442677f9230cc06778b58b1fed2bd3c926bf6f089b0c8c9f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7842 9984 bytes