Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a908a0fd4ddc08c…

MALICIOUS

PDF

76.2 KB Created: 2021-03-17 08:10:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 73e2410f15734f7a36d9d9b222d12b55 SHA-1: dfa44d140bf724b97a3b021e61bbe0c291dd2b1e SHA-256: 1a908a0fd4ddc08cb2fd99720fde6bd8de61ae89d489103eb070e35801b8b456
154 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one heuristic specifically identifying a 'mass external PDF link farm'. The ClamAV detection and ML classifier indicate maliciousness, and the presence of embedded URLs suggests an attempt to redirect the user. The document body, though heavily obfuscated, contains text related to 'Argos catalogue' and 'wkhtmltopdf', indicating a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9598

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
  • 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
  • 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://ponafet.ru/award?keyword=argos+catalogue+online+pdf PDF link annotation
    • https://cdn.sqhk.co/gipudeviwapi/Nid97hf/cinemark_peru_plaza_lima_sur_cartelera.pdfIn PDF document text
    • https://cdn.sqhk.co/zetoreli/Dgfjagj/huey_magoo_s_winter_springs_coupons.pdfIn PDF document text
    • https://cdn.sqhk.co/punenekebi/hXigL9P/dutanijulu.pdfIn PDF document text
    • https://cdn.sqhk.co/jujejorule/cghLjhE/zogurataloxud.pdfIn PDF document text
    • https://fibupodofakakov.weebly.com/uploads/1/3/4/4/134496100/xamituxubavusideme.pdfIn PDF document text
    • https://bejamipoxef.weebly.com/uploads/1/3/5/3/135318713/vozetaporu-lonipe-xefadi.pdfIn PDF document text
    • https://cdn.sqhk.co/kafekata/Kibiigf/mofibafudazogezupufumotu.pdfIn PDF document text
    • https://cdn.sqhk.co/wuwuvojik/djdFibR/51710118166.pdfIn PDF document text
    • https://cdn.sqhk.co/javepuju/1iihiVe/flick_hashtags_review.pdfIn PDF document text
    • https://famuvotatag.weebly.com/uploads/1/3/0/8/130813835/8a1bcdd5243.pdfIn PDF document text
    • https://cdn.sqhk.co/wobivada/RRbjjVU/find_fixed_objects_in_excel.pdfIn PDF document text
    • https://tazipapanora.weebly.com/uploads/1/3/0/7/130776418/toposetabedagosiw.pdfIn PDF document text
    • https://cdn.sqhk.co/vexapalas/geq5pxG/xafeb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/83394083819.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18c13f5d-87e8-49d7-b572-ec80daa14315/how_to_pass_algebra_1_final.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/bootstrap_4_forms_with_validation.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/30043667821.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36820d27-5907-4625-85b3-7e3b1735e57a/faiths_of_the_forgotten_realms.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/28701973761.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37ec84f5-86f6-4c1e-8de2-6237109e9c0e/is_a_malibu_front_wheel_drive.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/62274851743.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a61d5cc2-1124-4697-8830-3945338fa8c3/how_to_install_a_rheem_50_gallon_electric_water_heater.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/a_most_violent_year_parents_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/defa6a96-99ba-4030-9ae7-352f3bfba691/what_are_the_three_factors_that_influence_perception.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/30690426789.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB07 5312 bytes
SHA-256: 046d72321123ebc5ae25f2c7adad575c5641a0eadff7c49e319621a4580b776b
font_01_sfnt_off00010d30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D30 10928 bytes
SHA-256: 178cf9b32b430a8af53fcf6b408f4133e79d15430f20c65c554eb9b585d0a660

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