Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa6fbfd80301982c…

MALICIOUS

PDF

79.1 KB Created: 2021-03-07 01:11:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 725fefd0062c9075da048f112f5d3c15 SHA-1: d143c3784eebc49398719b1b509e60e1fbe8e43a SHA-256: aa6fbfd80301982cb95b3ad3f55411dc6d23763cf9802d340e6f570f43c8b703
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are presented as links to download educational materials. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of external URIs suggests the document is part of a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://bologen.ru/wb?keyword=class%207%20english%20book%20pdf%20download%20ncert PDF link annotation
    • http://d-youtube.com/text_to_voice_converter_freeo5a65.pdfIn PDF document text
    • https://cdn.sqhk.co/sipebililofo/ohfhi7j/dog_sms_ringtones_for_android.pdfIn PDF document text
    • http://securespot.ru/animal_coloring_sheets_for_preschoolers2xnzr.pdfIn PDF document text
    • http://tuvivukaroj.mygamesonline.org/would_you_change_your_religion_to_marry_the_person_you_love.pdfIn PDF document text
    • https://cdn.sqhk.co/kezixowog/bhejhhe/78786115059.pdfIn PDF document text
    • http://tehnotop.site/zugokomejugawezu4p029.pdfIn PDF document text
    • http://meinekarten.best/61298034840w14gh.pdfIn PDF document text
    • https://cdn.sqhk.co/sobupepokor/gheheij/guripawumulobilak.pdfIn PDF document text
    • http://coolvdomaion.online/vefakomixefogupefobubupe9pmhf.pdfIn PDF document text
    • http://zutelotojenexop.getenjoyment.net/my_water_heater_pilot_light_keeps_turning_off.pdfIn PDF document text
    • https://cdn.sqhk.co/valujoper/ficrIxH/87536607756.pdfIn PDF document text
    • https://cdn.sqhk.co/nojedevatas/hiNigf1/metallica_sanitarium_solo_tab.pdfIn PDF document text
    • https://cdn.sqhk.co/modurasisuwu/ijaCfO5/does_hallmark_movies_now_show_new_christmas_movies.pdfIn PDF document text
    • http://mmamba.ru/visual_basic_sql_tutorialsyiye.pdfIn PDF document text
    • http://mobile-media.moscow/minecraft_capes_1._13._2itq3r.pdfIn PDF document text
    • https://cdn.sqhk.co/kukojuvata/1jgcjfA/paxuk.pdfIn PDF document text
    • http://cpskras.website/xupetelikubetuxozqf6dh.pdfIn PDF document text
    • https://cdn.sqhk.co/tobamozusaj/p1Qgflb/5883702053.pdfIn PDF document text
    • https://cdn.sqhk.co/tasaxasup/aFQMgfp/hitman_sniper_rifle_paris.pdfIn PDF document text
    • http://puvinizozibejir.mygamesonline.org/a_song_of_ice_and_fire_map_interactive.pdfIn PDF document text
    • http://ig-copyrightviolation.com/21360045641qdrbh.pdfIn PDF document text
    • https://cdn.sqhk.co/pasepizut/pgghfhd/star_wars_the_327.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tiredosutozol.atwebpages.com/how_to_clean_ge_profile_microwave_filter.pdfIn 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_off0000eac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC5 5604 bytes
SHA-256: b68a8c1eace992519b5177cfc4fbef7d944ca1c6d56afca5ea12f7751683e7ce
font_01_sfnt_off0000fddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDB 10340 bytes
SHA-256: 1636b81e3912b1a001aa0ba8a703652c90a7f4341e92b3a27ce22ecb0b378eb9
font_02_sfnt_off000120f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120F1 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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