Malicious PDF — malware analysis report

Static analysis result for SHA-256 31794a48724e2ea1…

MALICIOUS

PDF

81.5 KB Created: 2021-04-03 20:25:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1706850623ff950c7107bf2149ac4eea SHA-1: c21533bdc400054677fad19f07306b567bab9b9a SHA-256: 31794a48724e2ea1c835b133b37502447dbc82bb585fbece3a0e78d1b444445b
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document is classified as malicious due to its extensive use of embedded links, many of which point to known malicious redirectors or link farms. The document appears to be a phishing lure, attempting to trick users into visiting potentially harmful websites by disguising malicious links with seemingly legitimate titles. The presence of numerous external links and a critical heuristic firing for malicious redirector links strongly indicates a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yafferge.ru/strik?utm_term=basic+elements+of+strategic+management+process
    • https://cdn.sqhk.co/vigomuraguf/gjJhRjj/bacon_the_game_power_outlet.pdf
    • https://cdn.sqhk.co/kodivitedi/Niejchj/nike_flip_flops_near_me.pdf
    • https://tabuwesajusa.weebly.com/uploads/1/3/1/8/131856124/potuxikew.pdf
    • https://nawexolaka.weebly.com/uploads/1/3/4/7/134704757/birifibajaza-lafux-tuxenag.pdf
    • https://cdn.sqhk.co/pupevadojas/gg0E4bt/risewobesu.pdf
    • https://cdn.sqhk.co/xetilibul/iicNbgh/free_dragonfly_illustration.pdf
    • https://jitolubupiloz.weebly.com/uploads/1/3/4/6/134637312/jorapuzilu_xateraduvazol_vanepu.pdf
    • https://dinowupeguf.weebly.com/uploads/1/3/1/3/131379410/mitowa-kilukokojo-vofebomokato.pdf
    • https://kelesive.weebly.com/uploads/1/3/0/8/130874426/wutava.pdf
    • https://vudivopaf.weebly.com/uploads/1/3/4/8/134876542/fizopogaluz.pdf
    • https://cdn.sqhk.co/dewufidabo/ahhijha/16582780165.pdf
    • https://wipusometava.weebly.com/uploads/1/3/4/8/134846349/kadoguxelorobim-wokivodikafiza-lifazozaji-ritudarudexu.pdf
    • https://jatuvukaxakepu.weebly.com/uploads/1/3/4/3/134313635/9c102f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://woxunegomuwajor.rf.gd/vokijujubuxilagalelin.pdf
    • https://uploads.strikinglycdn.com/files/d2f18c71-62ad-4dcd-84fa-102dbd6ca238/why_is_python_a_good_programming_language_for_beginners.pdf
    • http://rivebop.epizy.com/human_anatomy_and_physiology_10th_edition_free.pdf
    • https://uploads.strikinglycdn.com/files/7b981cfa-73c5-4a18-a802-b7eed8c37eee/biomedical_engineering_unsw_handbook.pdf
    • https://1094d5c0-a920-47c7-a1de-7e2d56a92d84.filesusr.com/ugd/47b1e8_b8fdf34e6e3e423c8c87364b7022f053.pdf?index=true
    • http://vaxabusegaw.epizy.com/fusep.pdf
    • http://kizuwopo.epizy.com/puniw.pdf
    • https://d89d6b52-6e76-4e18-bccb-bd7428cfddad.filesusr.com/ugd/02beb7_9a51fa9158ce40f593ddb799c54f8c1f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/74aa6fa9-5cd9-4452-9edc-a2f12b4bbd39/73394789523.pdf
    • http://zutotakome.epizy.com/vopefuzatususa.pdf
    • https://uploads.strikinglycdn.com/files/5cc6d3ce-7e47-43a2-a383-0be494780516/m2n68-la_narra6_motherboard_bios_update.pdf
    • https://4a5660cc-52a2-48ff-9acb-4b4f1704cb6e.filesusr.com/ugd/81868d_0ed4c919a7c04fafb17461f8528f9d98.pdf?index=true
    • https://uploads.strikinglycdn.com/files/bd562f1d-7042-4319-a08b-8e53bc9669f0/76111952990.pdf
    • https://3e3188f7-d9e9-48da-9af6-4e6760718ee0.filesusr.com/ugd/4f7562_8eb1b4caf5754aa5a55e19799f25a2ff.pdf?index=true
    • 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_off0000f417.bin
94cb18e7c2a13e703ae54de2adb5bfb41f287d850bb08330fe400a38ca42b5b7
pdf-font-stream PDF embedded font (sfnt) at offset 0xF417 5172 bytes
font_01_sfnt_off00010589.bin
d59db293262884e4d3ff8b207bb9bdb38f2e65d450a8fa247ebf9b084359bf81
pdf-font-stream PDF embedded font (sfnt) at offset 0x10589 10888 bytes
font_02_sfnt_off00012a13.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A13 4324 bytes