Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6dfb88c14128f55…

MALICIOUS

PDF

82.2 KB Created: 2021-03-31 05:22:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: bdd2c5cbf6a89133e766f65fe02a85ed SHA-1: e053f7a4ece9e0e13cb38c0e9ef881242617a9f5 SHA-256: b6dfb88c14128f55f5fd129c05b009688c075c7cfcf52c472396057aefc1f014
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The document body, though heavily obfuscated, suggests a lure related to firearm ballistics, which is used to direct users to external sites. The presence of multiple external URIs and link farm characteristics indicates a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://maypoin.ru/strik?utm_term=ar+15+muzzle+velocity+vs+9mm PDF link annotation
    • http://gratoramaa.space/candy_tomatoes_recipeqegzc.pdfIn PDF document text
    • https://nozabuzewetuk.weebly.com/uploads/1/3/2/6/132683147/d0cf9.pdfIn PDF document text
    • http://de-bewertung-id2842384.icu/what_size_tire_is_best_for_flippingt1xtr.pdfIn PDF document text
    • https://zazewefagawi.weebly.com/uploads/1/3/0/7/130776698/3327157.pdfIn PDF document text
    • https://safamitiwifiro.weebly.com/uploads/1/3/0/7/130739579/jinaji.pdfIn PDF document text
    • http://kzrovk.xyz/sajufugodivozh9ab.pdfIn PDF document text
    • https://vivuguduwidu.weebly.com/uploads/1/3/2/6/132681484/jerovoju_zizozitodinev.pdfIn PDF document text
    • http://lnstagramverificationbadge.com/radovepufejumevasozssy.pdfIn PDF document text
    • http://wacc-cat.org/8960619315ezm3.pdfIn PDF document text
    • http://heartcenteredequestrian.com/check_writing_worksheetsgxop5.pdfIn PDF document text
    • http://kiruvoxexuk.iblogger.org/29450278648.pdfIn PDF document text
    • https://kosilamegorigi.weebly.com/uploads/1/3/1/4/131409210/sivulivenit.pdfIn PDF document text
    • http://sexugaweguko.iblogger.org/noziliwik.pdfIn PDF document text
    • http://neliwiveles.22web.org/aircraft_design_a_conceptual_approach_daniel_p._raymer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://dijorud.epizy.com/92002158432.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e824ed0-7247-4410-a9b4-296905ef53d3/what_instrument_is_used_to_measure_relative_humidity_and_dew_point.pdfIn PDF document text
    • http://bukogog.epizy.com/81836789306.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba763b89-0fa5-4d7a-a38e-27e6461fe084/how_to_load_a_stanley_sharpshooter_electric_staple_gun.pdfIn PDF document text
    • http://kivekedifewu.rf.gd/canon_speedlite_430ex_ii_user_guide.pdfIn PDF document text
    • http://widuxetikos.epizy.com/vikazi.pdfIn PDF document text
    • http://lujarozukivexoz.epizy.com/how_do_i_reset_my_treadmill_speed.pdfIn PDF document text
    • http://vumebef.epizy.com/49344203769.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da82dc05-8d63-46ce-852b-a12bbab201ec/gizavurapukunavu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f60c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60C 5044 bytes
SHA-256: 836e21c2ee10d2940ce67b6b6441da8a0f7df7ee2310f05294447e147450a766
font_01_sfnt_off00010752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10752 10912 bytes
SHA-256: d71d9156f58c48b57e547ccc7e3ace93bf24e2dbaadd9655d5c4ed761de64b27
font_02_sfnt_off00012c78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C78 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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