Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e1976757ee6e754…

MALICIOUS

PDF

81.4 KB Created: 2021-03-14 19:12:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bdd9e71e37ddf6edec2d0124868af8a SHA-1: 7f1d8b1958a7cd06c1cd9b8476e2ffc3de6b1946 SHA-256: 5e1976757ee6e754d4be314d2650aa59d7cecc9eb78d9a159e0c9ba3c2897b80
126 Risk Score

Malware Insights

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

The sample was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, with at least one pointing to a link farm on disposable hosting, indicating an attempt to redirect users to malicious content. The PDF structure and embedded URIs suggest it's part of a phishing or malware distribution campaign.

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://maypoin.ru/award?keyword=cathode+ray+tube+experiment+pdf
    • http://jipolavex.medianewsonline.com/love_story_re_recorded_version.pdf
    • https://cdn.sqhk.co/fujotojaxob/ijjiO47/polaroid_originals_cameras_and_stranger_things_collection.pdf
    • https://jowatoziji.weebly.com/uploads/1/3/4/8/134893097/44931cc7ef2314.pdf
    • http://xevusezes.medianewsonline.com/ravefusis.pdf
    • http://wodekenizowa.getenjoyment.net/regasu.pdf
    • http://sopugepibimel.mypressonline.com/17084089534.pdf
    • https://boziwukajolefix.weebly.com/uploads/1/3/2/7/132711983/3df668f.pdf
    • http://dobofozepop.mygamesonline.org/29833553930.pdf
    • http://wosozage.mypressonline.com/waste_water_treatment_plant_project.pdf
    • https://xopilinunerixaw.weebly.com/uploads/1/3/1/3/131380618/03fd7ea7.pdf
    • https://cdn.sqhk.co/pewesopefim/ciaibHG/sefozadixewezolu.pdf
    • https://cdn.sqhk.co/luwokiseg/gjEoZgh/alarm_clock_app.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://pidelusinurak.rf.gd/38434778534.pdf
    • http://zivuneko.epizy.com/nobuvetevevijex.pdf
    • https://7be8961d-effb-4c78-a255-78c3c9f0be09.filesusr.com/ugd/3dd68e_fe37b00de0134a1fb4634713642da19b.pdf?index=true
    • http://tinutun.epizy.com/nowofazolisijifin.pdf
    • https://9907981b-0bc7-4fd3-a434-169f7cdadf42.filesusr.com/ugd/575363_e351cb8af9f94fda9fd98b396da01534.pdf?index=true
    • http://vigavanoxe.onlinewebshop.net/sweetie_pies_cookbook.pdf
    • http://sewujobupijo.epizy.com/xilivojikejizi.pdf
    • https://2d2b1dae-c014-4902-97e6-c3f1d56915cd.filesusr.com/ugd/70e5f7_35f0cb7e04eb4200b19f46cef592eb85.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1e2.bin
b0956885d3919ae1187638641133f3ddbacd863f6a5ad83cd6ff2c02b524b1e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E2 5284 bytes
font_01_sfnt_off000103bd.bin
3dd407b74ee5c3c3232811b51e4c83148dfc4c69ffbda030e9ce579c5ba1bc59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103BD 11276 bytes
font_02_sfnt_off00012a41.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A41 4324 bytes

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