Malicious PDF — malware analysis report

Static analysis result for SHA-256 b01e5ac9c465ab1e…

MALICIOUS

PDF

32.5 KB Created: 2020-10-29 16:26:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79d70dd7459bdb28998ef80cd977a04b SHA-1: d39a575edb16ac8e7c8e768b4ac01f0d470d6bb7 SHA-256: b01e5ac9c465ab1e86227e5467545500cac780ea26a3237144f17cd42521ade8
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though partially garbled, includes the target URL, suggesting a lure to trick users into clicking on a malicious link. The ML classifier also strongly indicated maliciousness.

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://gettraff.ru/strik?keyword=arkansas+high+school+invitational+2020+live+results
    • https://xavujome.weebly.com/uploads/1/3/0/7/130739328/zumefukogaj_gevemeve_kaxol_fufavegalukaj.pdf
    • https://zoveponezewuda.weebly.com/uploads/1/3/0/7/130738822/1bf9fe786c5ed4b.pdf
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/6644034.pdf
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/5203221.pdf
    • https://gasomuvujutomeb.weebly.com/uploads/1/3/4/3/134356107/6592894.pdf
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/kobezupapupimon.pdf
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/nufupu-waler.pdf
    • https://gejatovuri.weebly.com/uploads/1/3/1/4/131406669/voxodibujufu-gusojowubozalat-jijiruzad-sadovuvu.pdf
    • https://cdn-cms.f-static.net/uploads/4386347/normal_5f8e96e703abb.pdf
    • https://junafoxotoroj.weebly.com/uploads/1/3/0/7/130738975/9259281.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tapexiw/zunuxofiwozedokum.pdf
    • https://s3.amazonaws.com/memul/problems_of_inter_ethnic_relations_in_nigeria.pdf
    • https://s3.amazonaws.com/memul/blast_furnace_slag.pdf
    • https://s3.amazonaws.com/kizugokofo/jepowerubuwuwelub.pdf
    • https://s3.amazonaws.com/felasorarabipis/reresewoferidejopala.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_off000042d8.bin
c1b214fafcc0f179b8db22fecae0d7e155a3715f397a3331c6cd3248a817fb25
pdf-font-stream PDF embedded font (sfnt) at offset 0x42D8 5448 bytes
font_01_sfnt_off00005565.bin
d235c06c876371cf829317d629738ffbce8a9487073ba14d56b99338372d2ea1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5565 9268 bytes