Malicious PDF — malware analysis report

Static analysis result for SHA-256 0396c9fa19943fd7…

MALICIOUS

PDF

82.9 KB Created: 2021-03-14 15:32:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 84cbccf38472f7c245c0c776e15abe48 SHA-1: 38d263e334fe761d2a525ee5c4c5e2b205c6c77f SHA-256: 0396c9fa19943fd785a3c58e580449eff1d0e12843d45721dcb5d3e972ef5d9e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xezojetit.ru/wix?keyword=accumulation+function+calculus PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4416923/normal_6003b1b4559a7.pdfIn PDF document text
    • https://cdn.sqhk.co/rorezina/7iagdsg/79469678009.pdfIn PDF document text
    • http://ragitikevuwa.22web.org/51556480194.pdfIn PDF document text
    • http://coolmag.biz/adrienne_rich_when_we_dead_awakenv2b5k.pdfIn PDF document text
    • https://cdn.sqhk.co/lofopapenow/tggiggi/pugusufedumuzutolilo.pdfIn PDF document text
    • http://cg-designer.xyz/which_of_the_following_accounts_is_not_reported_in_the_stockholders_equityq3ot3.pdfIn PDF document text
    • http://tokibekojavo.22web.org/44399653057.pdfIn PDF document text
    • https://cdn.sqhk.co/nokikijun/55xKidD/allen_bradley_powerflex_400_user_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419851/normal_602a8ee69bc1b.pdfIn PDF document text
    • http://torevifij.iblogger.org/carrier_infinity_touch_thermostat_user_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/sadudolamom/8ghiaui/tiduxizapegirawaka.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/5gdrhcz/assassin_s_creed_4_black_flag_naval_contracts.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505687/normal_6042c3c9bd5f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421473/normal_60320eedc269d.pdfIn PDF document text
    • http://deutschebank-meine.com/357018107529hpoa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407100/normal_5feba50cc7c99.pdfIn PDF document text
    • http://alex-travel.moscow/memphis_bleek_infatuatedg00ij.pdfIn PDF document text
    • http://vukesis.iblogger.org/maple_leaf_template_printable_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zizuzilo.epizy.com/neural_network_fuzzy_logic_and_genetic_algorithm.pdfIn PDF document text
    • http://bubewap.rf.gd/sifozitudofub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/623ffad7-985e-40b5-b1b4-487ac3fc4c4b/historia_universal_de_la_infamia_epub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f36bd63-a511-46c4-b121-c6ca67c65dfb/how_to_wear_a_bed_sheet_as_a_toga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a87d5f4-acd3-4427-a0a9-6343a4710750/76555384098.pdfIn PDF document text
    • http://logiwabu.epizy.com/zodekibivefaxemoganesupon.pdfIn PDF document text
    • http://fizefitelibulob.epizy.com/escherichia_coli_characteristics_morphology.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000105ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105AE 4920 bytes
SHA-256: 52d341b32424bd6bf242554ee36950dcfd61775ec0738bfea2e650057837f519
font_01_sfnt_off00011661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11661 11160 bytes
SHA-256: 53bf9a83297855c3139e74cd7e0599acfce1d6afaba9468649ef6d97f973ee79

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