Malicious PDF — malware analysis report

Static analysis result for SHA-256 dac0fbed7b339a9e…

MALICIOUS

PDF

90.9 KB Created: 2021-04-03 12:18:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 06f276616f8c23026b3b9f5c8ca6312a SHA-1: 8b8ec352b2a292b9e06bf71457a0b2cd1ea1ebe0 SHA-256: dac0fbed7b339a9ee57a3e1926bcdf7ea4601045c016adb37524d1fcb20d5492
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary malicious URL identified. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to a 'Singapore airport food guide'. The presence of external URIs and a link farm heuristic further supports a phishing or redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://mezovuduw.ru/123?utm_term=singapore+airport+food+guide PDF link annotation
    • http://igrarazuma.info/bluffton_sc_marriott_hotels5fq95.pdfIn PDF document text
    • http://cabinetsop.xyz/banished_tv_series_episode_guidehbo55.pdfIn PDF document text
    • http://shoop-fk.ru/bhootnath_song_video4enu6.pdfIn PDF document text
    • http://kyukty68.xyz/resudegekebugobokatovirorqc.pdfIn PDF document text
    • http://hookup154.space/16696241818vd84.pdfIn PDF document text
    • http://keepmaxi.space/651920642og35b.pdfIn PDF document text
    • http://lovemecompletely.com/32237471686c31ev.pdfIn PDF document text
    • http://zumufaxe.iblogger.org/klein_tools_mm2000_battery_replacement.pdfIn PDF document text
    • http://uniques.space/ptwoe_playstation_2_emulatort7dyi.pdfIn PDF document text
    • http://fuxelepedudane.iblogger.org/burasaj.pdfIn PDF document text
    • http://edevletorg.com/84466120079wzk92.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cf5e284-e79e-4bea-8936-45d468d03793/13871858430.pdfIn PDF document text
    • https://80f75f89-a1e3-4611-a0ef-7a704eb82da9.filesusr.com/ugd/0286dd_977a75523a2342dc9f3ffb8bfb62b543.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e9ada15-2ba9-4b5a-afe0-ff531df51ccc/zao_shang_translation.pdfIn PDF document text
    • http://femavumifixomud.rf.gd/mining_leveling_guide_ffxiv.pdfIn PDF document text
    • https://be9ca920-c372-4566-b00d-544f92814f3b.filesusr.com/ugd/f0c5a9_5409905779634f50ba33df69a4cd117c.pdf?index=trueIn PDF document text
    • https://47ab6ce1-aee6-4086-a8e7-31fe393d2411.filesusr.com/ugd/afbef4_bd71c44ed88f4329a6937cb7a2fa398a.pdf?index=trueIn PDF document text
    • http://ketoxuxun.epizy.com/absentismo_laboral.pdfIn PDF document text
    • http://jumezezufa.rf.gd/baxevikeras.pdfIn PDF document text
    • https://dacf5b84-f80e-4bd8-bb7f-22aad20a1cd8.filesusr.com/ugd/285be4_c939c0ae809f486cb605629abae8155a.pdf?index=trueIn PDF document text
    • https://f1ddcea9-c323-452c-a4d3-aaefec61e50a.filesusr.com/ugd/defd8a_52e90cfae461491188bb4d258cd42b68.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9c49737-5c85-4983-af36-0ff4654105a7/how_do_i_update_netflix_on_my_sony_blu_ray_player.pdfIn PDF document text
    • https://d2ffd92d-ad89-4e9b-8359-126286817a3c.filesusr.com/ugd/dd9784_a6786c88e42d4b50b78229fc3b3c584b.pdf?index=trueIn 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_off000111cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111CB 4788 bytes
SHA-256: dad75152c6087c6fa16fbe6e4d0c4e0f7aab44d79ee2f24d8c4973de4b370a27
font_01_sfnt_off000122ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122AD 5104 bytes
SHA-256: 6763db7843b90f45d3347a4884cc4d974f40fe1c5d0c02de5df0ba43114cadaf
font_02_sfnt_off0001341c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1341C 11924 bytes
SHA-256: 8dd02e0edf0c47e531143034a09be8f8bc308650554550eb2617b4b669e31f4e