Malicious PDF — malware analysis report

Static analysis result for SHA-256 0710197aa4f3c03e…

MALICIOUS

PDF

71.0 KB Created: 2021-04-01 16:11:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 700b03e38b150cde7bcb3084d145e36b SHA-1: 7d8c81b5b70fff7fcf05566333f65976881b6a71 SHA-256: 0710197aa4f3c03eaf3b99bbf496a0516b07b6decece7554a195793149885a97
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, and is described as a link farm. The document body, though partially garbled, references 'Lg hbs 730 replacement parts', suggesting a lure to disguise the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/aws?utm_term=lg+hbs+730+replacement+parts
    • http://hotita.fun/1603226021ntla0.pdf
    • https://xujuwoxevosu.weebly.com/uploads/1/3/4/8/134896670/e1770531.pdf
    • http://gutemelav.22web.org/vagujasaxazoj.pdf
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/mugulajibiladux.pdf
    • https://cdn.sqhk.co/ravawiku/gf0qhbd/marshmallow_bits_publix.pdf
    • http://vsedlyatebya.xyz/vukimafapoqxl3u.pdf
    • http://tramlaweq.online/project_management_certification_courses_onlinez8koc.pdf
    • http://vekvelo.ru/mba_supply_chain_management_online_usarofwp.pdf
    • https://serelikiwep.weebly.com/uploads/1/3/4/4/134476809/b79e00e41.pdf
    • http://kozijadeji.22web.org/osrs_cooking_gauntlets_guide.pdf
    • http://cethq.xyz/toyota_forklift_spare_parts_manualvg29j.pdf
    • https://cdn.sqhk.co/polopomoset/XTYhhpd/ridat.pdf
    • https://cdn.sqhk.co/vabadoma/g5if4ha/are_jelly_bands_good_for_hair.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/resixexi/how_to_change_a_rainsoft_water_filter.pdf
    • https://s3.amazonaws.com/xamapebonijos/sajafezafubalavepiromudir.pdf
    • http://nawexox.epizy.com/48193798771.pdf
    • https://s3.amazonaws.com/muvevanepen/auto_video_player_android_github.pdf
    • http://kititone.epizy.com/java_7._23.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_off0000d4b6.bin
227d8bb1dc7d7fa6b9c7b4dcfa0c683952e9b71e210a50d64374d6f33cff9148		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B6 5812 bytes
font_01_sfnt_off0000e859.bin
3054f3c3476ec8bdc7e51ec960a0078b662c5324c2d6f15497bab7439ea96a5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE859 10876 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.