Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b489ab75fb13c1f…

MALICIOUS

PDF

79.2 KB Created: 2021-03-31 10:08:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab95bf7ffa0accc663e3d95020251c15 SHA-1: d6f0238cc5653e90ba5bd9bf1014e09aaa366b56 SHA-256: 3b489ab75fb13c1fae784ab50aa5c340ffaec8cafbaabad30a18fed5a49de5c3
96 Risk Score

Malware Insights

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

The PDF document contains a lure related to fixing an air conditioner error, which is a common social engineering tactic. It embeds multiple URLs, one of which is directly referenced in the document body, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://fokemale.ru/strik?utm_term=how+to+fix+e7+error+on+haier+air+conditioner
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdf
    • https://cdn.sqhk.co/fojilude/c2Picfe/top_up_worldwide_mobile.pdf
    • https://cdn.sqhk.co/wexunaveb/evFGIih/for_kobe_bryant.pdf
    • https://cdn.sqhk.co/guvevifowo/ignjfJH/lazavino.pdf
    • http://axecheat7.xyz/26540339tzm0c.pdf
    • https://cdn.sqhk.co/ripowusaro/d8wRqgg/gemufuz.pdf
    • https://cdn-cms.f-static.net/uploads/4450247/normal_60357d3010711.pdf
    • https://cdn-cms.f-static.net/uploads/4491945/normal_5fdb11aae8293.pdf
    • https://static.s123-cdn-static.com/uploads/4474998/normal_5ffa98e6d82ce.pdf
    • http://spainwow.pro/429073413255bc7t.pdf
    • https://cdn-cms.f-static.net/uploads/4459029/normal_602e004b3496e.pdf
    • https://cdn.sqhk.co/verexoleki/hjNaCDs/nuts_and_bolts_organizer_lowes.pdf
    • https://cdn.sqhk.co/muwizavo/iQglysI/ridosidefalofup.pdf
    • https://static.s123-cdn-static.com/uploads/4417808/normal_5ff0b1ab8cd86.pdf
    • http://omynutural.space/pico_island_map5p23e.pdf
    • https://cdn.sqhk.co/mokevesin/fhijdhf/dufonapavivig.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/ditiruz/vedaxafarobeponeb.pdf
    • https://s3.amazonaws.com/zatasipezeg/classical_greek_alphabet.pdf
    • https://s3.amazonaws.com/dadupawo/sacs_teaching_accreditation_guidelines.pdf
    • https://s3.amazonaws.com/pusori/bts_run_ep_33_eng_sub.pdf
    • https://s3.amazonaws.com/mubefula/94106335382.pdf
    • https://s3.amazonaws.com/zubata/how_light_pilot_on_gas_fireplace.pdf
    • https://s3.amazonaws.com/juvosi/dslr_camera_phone_app.pdf
    • https://s3.amazonaws.com/wegugus/money_envelope_template.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_off0000f630.bin
6ba8cd36c5221a9455ab656b8096de27d534482a735b852e397eaee7efb669f0
pdf-font-stream PDF embedded font (sfnt) at offset 0xF630 5100 bytes
font_01_sfnt_off0001079f.bin
6ecf679b937d0ac84f77fc9e110e2624ea2d81ac307f00a1c60972b7f78f67de
pdf-font-stream PDF embedded font (sfnt) at offset 0x1079F 11732 bytes