Malicious PDF — malware analysis report

Static analysis result for SHA-256 13c9377751e04aee…

MALICIOUS

PDF

79.2 KB Created: 2021-03-14 13:35:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 593f62dcb847598d643cdaa36cb1a7e4 SHA-1: d46254b14f32f82afe0ea652be8d2f58eb840992 SHA-256: 13c9377751e04aee1fdb50e14221baeb3eb65c7c95389e3d9f9859d3f49f2ae3
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains text related to Garmin GPS updates, serving as a lure to encourage users to click the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://dugedepap.ru/strik?utm_term=how+to+update+garmin+430+database PDF link annotation
    • http://titoto.xyz/59573874240e3of8.pdfIn PDF document text
    • http://pogadai.xyz/diplomat_dual_watch_winder_manual3po5q.pdfIn PDF document text
    • https://cdn.sqhk.co/tadanopi/pnjiFvl/54905845752.pdfIn PDF document text
    • http://hookup157.site/gajulopudorejq9jn4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479675/normal_6009309334aa5.pdfIn PDF document text
    • https://cdn.sqhk.co/nizekidido/arOheja/pomawefiralime.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387226/normal_602c8b30ca114.pdfIn PDF document text
    • https://cdn.sqhk.co/wotinobeb/d7kUhh3/jetpack_joyride_mod_apk_ios.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405195/normal_60437a84920ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374517/normal_5ff272199c21e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377905/normal_602550f832891.pdfIn PDF document text
    • https://cdn.sqhk.co/pekotegafod/ggdifih/ear_doctor_singapore_mount_elizabeth.pdfIn PDF document text
    • http://creditpm.com/17436165942ifpye.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0dd0cd87-80d3-4eb5-b9c6-73c43c3a6fca.filesusr.com/ugd/f0b6b3_83e3f6449df143f59259242deeb576cb.pdf?index=trueIn PDF document text
    • https://7e005a1c-fb68-43c1-af83-b854b6a2d282.filesusr.com/ugd/dcfb95_1cda716835c445048b83e577b7bc4d6e.pdf?index=trueIn PDF document text
    • https://1c985592-4fe2-425a-b8d2-7dc24782370c.filesusr.com/ugd/a13bc2_2708b5a28a2249ad9dac6d18105904bc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/hiv_aids_positive_report.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/gameboy_advance_emulator_android_reddit.pdfIn PDF document text
    • https://e61e9f85-32c5-4861-9fd4-b89109084c35.filesusr.com/ugd/2e4eb4_dc3e95da68ef411ca5172c9bdc7d98e2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/how_to_lie_with_statistics_summary.pdfIn PDF document text
    • https://9e7b01ce-91ce-414a-93c5-ade8df4b7359.filesusr.com/ugd/cfbfd2_eb88e8c9fea345a9b5d9001649378d2e.pdf?index=trueIn PDF document text
    • https://8d5bcf17-53f2-4f21-b585-7a27aef14131.filesusr.com/ugd/7baf93_155a64a381fb459ba04e56a0efbceeae.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gitipelut/apk_auto_ram_booster_pro.pdfIn PDF document text
    • https://8f1c0ae7-1ba6-4c51-a623-4d29f5e3aebb.filesusr.com/ugd/c1615c_d536db64941e49e6bbdfd12f152efe24.pdf?index=trueIn PDF document text
    • https://451b78f8-089e-4d4d-bc4b-60abb621f7e6.filesusr.com/ugd/7ef0dc_d583af1f38a64eeb89a3f43ca9029ad0.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DE 5836 bytes
SHA-256: 4a66a861e201e226ae0c164c043d958938e557916c5c665626558198d1390e0c
font_01_sfnt_off00010bb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB1 10396 bytes
SHA-256: b488804a03130b9163552d4951b03857b26aebec5db946dd6909f63a5d189eb6