Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e3cc6690381d2ff…

MALICIOUS

PDF

79.8 KB Created: 2021-03-21 01:05:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04a00e7f89adb655f24743b3cf8806e0 SHA-1: d0cd9e3b4a54265fdedf7a2c98cab9f37c1dd183 SHA-256: 7e3cc6690381d2ffacbdb81aa0ca1b67095543112907186f806305b9393ea4df
126 Risk Score

Malware Insights

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

The PDF document is identified as malicious by ML classifiers and ClamAV, and contains numerous embedded URLs. The document body, though heavily obfuscated, suggests a lure related to a product manual. The presence of many links to disposable hosting services indicates a likely phishing or spam campaign aiming to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/wix?keyword=bosch+dishwasher+shx46a05uc%252F21+manual
    • http://nabavawuzafurur.mygamesonline.org/51970074643.pdf
    • http://dekagexagupeje.iblogger.org/30415457227.pdf
    • http://palaxofivuleduj.medianewsonline.com/75885896444.pdf
    • http://nibajafij.medianewsonline.com/71095592186.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://ragomoxos.rf.gd/the_courage_to_be_disliked_review.pdf
    • https://76b44699-1094-4fd8-8d4a-70b7be8159c3.filesusr.com/ugd/c450b2_c6d37e0323d742b499dbe1e288adf6d2.pdf?index=true
    • http://bimemelal.epizy.com/corel_draw_x5_tools_tutorial.pdf
    • https://s3.amazonaws.com/wikurixobelu/39159531547.pdf
    • https://s3.amazonaws.com/jolozidabi/colony_comparison_chart_answer_key.pdf
    • https://f77c8dad-41d7-4a8f-8d8d-c05149a3a236.filesusr.com/ugd/36d413_0b5da208aefd4ed7a7f14d7bb206cbaf.pdf?index=true
    • https://21036261-01f9-4725-a342-2b8b08d10099.filesusr.com/ugd/d0cbc4_f7f8f32bbfc043448c94d81caa7f27cc.pdf?index=true
    • https://uploads.strikinglycdn.com/files/041ce0c2-37f2-4497-b5f5-1ff450aec09e/nakilofoxaladowudaf.pdf
    • https://uploads.strikinglycdn.com/files/3f315a3d-8be7-4792-8fd4-8c94091dd5e1/pokejanetekodebata.pdf
    • https://ff0b3df2-dc61-4aeb-9024-93fa9b5bc175.filesusr.com/ugd/aa14a9_261b77984ee549a18983b42b26faf8da.pdf?index=true
    • https://1c8fadd7-09eb-4d2b-9d42-8e747ba5ce52.filesusr.com/ugd/60625b_bba78ac1a9ea47bd8d1da4f78f6474c9.pdf?index=true
    • http://lodusebivepakef.epizy.com/antarctica_climate_reading_answers.pdf
    • https://s3.amazonaws.com/mefovu/bumogobuk.pdf
    • https://s3.amazonaws.com/jupudizadid/49568587232.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_off0000f736.bin
2d7c54e72fec127b637b8035e7542ee45affe4bc5b951eb9dcfb2f2ac6898654		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF736 6116 bytes
font_01_sfnt_off00010c0d.bin
65a229af93ba7cf381d9fe1038720936f117bf6927c5c20e3e193745e9b5dccb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0D 11152 bytes

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