Malicious PDF — malware analysis report

Static analysis result for SHA-256 03a40077098f3090…

MALICIOUS

PDF

50.8 KB Created: 2020-10-26 19:06:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 251b857dfa6da56f52c057be0559f99f SHA-1: 9a4ad8ae767e162184ca51aa2fd1011dc6fb3b3c SHA-256: 03a40077098f3090bb03f03f0823df0e3371738e92d05d179e024eca1baabcc3
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded URL is the primary indicator of malicious intent, likely leading to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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?keyword=rolling+block+rifle+vs+carcano+rifle
    • https://cdn-cms.f-static.net/uploads/4368952/normal_5f87b6e2e0306.pdf
    • https://cdn-cms.f-static.net/uploads/4374517/normal_5f8ca15080034.pdf
    • https://cdn-cms.f-static.net/uploads/4370304/normal_5f88316c9b1d1.pdf
    • https://cdn-cms.f-static.net/uploads/4379742/normal_5f8fa567a140d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/zufaxepixiguxax/yuddha_kanda_telugu.pdf
    • https://s3.amazonaws.com/felasorarabipis/barron_s_sat_subject_test_biology_e_m_6th_edition.pdf
    • https://s3.amazonaws.com/fasanag/88872590041.pdf
    • https://uploads.strikinglycdn.com/files/ec33a76f-268b-43c9-bd7f-ceaceff6782b/art_of_storytelling.pdf
    • https://uploads.strikinglycdn.com/files/cf86f28a-0395-42fe-aeee-3d026aebd3a5/55042365419.pdf
    • https://s3.amazonaws.com/subud/59882732911.pdf
    • https://s3.amazonaws.com/felasorarabipis/8967224200.pdf
    • https://s3.amazonaws.com/dazemi/90152377724.pdf
    • https://s3.amazonaws.com/dujepav/electrolysis_of_seawater.pdf
    • https://s3.amazonaws.com/subud/zawep.pdf
    • https://s3.amazonaws.com/tabobujimo/caffeine_citrate_davis.pdf
    • https://s3.amazonaws.com/mejifavo/cell_phone_addiction_test.pdf
    • https://s3.amazonaws.com/felasorarabipis/air_vessel.pdf
    • https://s3.amazonaws.com/napisakaluja/64269862599.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075e6.bin
7f2a0a0e71a4c3311929fa011b9273ae47c5b00c79aee4c7c81ce63652901792
pdf-font-stream PDF embedded font (sfnt) at offset 0x75E6 5028 bytes
font_01_sfnt_off00008712.bin
47be4e3372ebce66d8d8f7b1df6181bd79b20a66d5ecd8e4233c74c556fbfe7d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8712 12636 bytes
font_02_sfnt_off0000afd7.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0xAFD7 4324 bytes