Malicious PDF — malware analysis report

Static analysis result for SHA-256 75bd7f3c06ab3f4a…

MALICIOUS

PDF

84.6 KB Created: 2021-04-01 19:48:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d0e40674a9dba3b80ace2e5151110ee SHA-1: 587ba6be203aed2011e7df42210c7037c289010d SHA-256: 75bd7f3c06ab3f4a89029475a880f8189087c1d64b75ca843a942eff5adc92c2
126 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing or trojan. It contains numerous embedded URLs, many of which point to disposable hosting and form a link farm, a common tactic for phishing or malware distribution. The document body, though heavily obfuscated, contains text related to a 'bible reading plan', likely a lure to encourage users to click the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/strik?utm_term=m%2527cheyne+bible+reading+plan+printable
    • https://jaduxopedarev.weebly.com/uploads/1/3/4/7/134749363/ddb5a.pdf
    • http://kaxidabifibag.iblogger.org/kusivodevux.pdf
    • https://bugojexipu.weebly.com/uploads/1/3/1/3/131398417/dfc4c519.pdf
    • https://zuzuxaze.weebly.com/uploads/1/3/4/0/134040629/tutemokivid_sutenikom_kumogerapiti.pdf
    • http://gisonanezoboru.iblogger.org/wondershare_mobilego_for_android_pc.pdf
    • https://lenukomezol.weebly.com/uploads/1/3/4/3/134311572/pagusosewitumu.pdf
    • https://lunejuwibamir.weebly.com/uploads/1/3/4/5/134587588/nijadajerofomomofeso.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/magapeguwabe/15292874301.pdf
    • https://s3.amazonaws.com/pobixedele/nokisawokutasuzafikakupu.pdf
    • http://talavapupaniv.rf.gd/vabevami.pdf
    • http://didaduxazej.epizy.com/doxaw.pdf
    • http://kerakuwopimarin.epizy.com/sfp-_10g-_sr-_s_cisco_datasheet.pdf
    • https://uploads.strikinglycdn.com/files/71c21ac4-04cf-41c5-8eb6-d0743819b8a9/pork_hock_recipes_oven.pdf
    • https://uploads.strikinglycdn.com/files/af93a427-e71b-43b7-b508-d4cec992f992/10953194471.pdf
    • https://uploads.strikinglycdn.com/files/0ac6e4ee-c52a-4e04-bd56-0bc4269d84f1/schwartz_quantum_field_theory_and_the_standard_model.pdf
    • http://sirowozikuko.epizy.com/37776609457.pdf
    • https://s3.amazonaws.com/tabobujimo/burger_king_coupons_2019_oktober.pdf
    • https://uploads.strikinglycdn.com/files/915258bf-1838-40fd-88f0-8a523f623fd0/nubafogof.pdf
    • http://doregupubufuve.rf.gd/67391294355.pdf
    • http://fegopebofid.epizy.com/what_is_the_theme_of_the_myth_theseus_and_the_minotaur.pdf
    • http://zuniguvip.epizy.com/naming_faces_edges_vertices_worksheet.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_off0001098f.bin
9270255e64e630272a076759cfd731dcb5ac13ca7e26e1173dfe101bb393fb13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1098F 5436 bytes
font_01_sfnt_off00011c1a.bin
d986291960ad3bbc1b44d0daa282a183c1638684f6e10899995cc7f33c11573b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C1A 12660 bytes

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