Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bb53360346d1d9c…

MALICIOUS

PDF

97.4 KB Created: 2021-03-19 06:48:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: f7e7231e190f63a0844e5f7405ff0b90 SHA-1: eaa46f255dd42a4c132f53446ea7932b3db69f94 SHA-256: 0bb53360346d1d9cf990bf52d1d9526a808443dfba9ef7942f3ba15485a93cbe
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, identified as a link farm. The ClamAV detection and ML classifier strongly indicate maliciousness, likely phishing or malware distribution. The embedded URLs point to various domains, some of which appear to be disposable hosting, suggesting an attempt to obscure the ultimate destination or evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/wix?keyword=simply+christian+nt+wright+pdf PDF link annotation
    • https://cdn.sqhk.co/seseniluvus/hanidii/cheetah_robot_car_transformation_formula_car_robots.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464524/normal_5feb173f3a198.pdfIn PDF document text
    • https://cdn.sqhk.co/fibapezo/idWjjA9/zaxixoxifikojipupevagen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447465/normal_5fd724a016b57.pdfIn PDF document text
    • https://buzomuzugagi.weebly.com/uploads/1/3/4/3/134313884/zigadiwada.pdfIn PDF document text
    • http://kyukty68.xyz/84848971435rw4d7.pdfIn PDF document text
    • https://vojitimene.weebly.com/uploads/1/3/4/5/134596684/bepug.pdfIn PDF document text
    • https://cdn.sqhk.co/pagozixupezi/8RJjh27/61081016002.pdfIn PDF document text
    • http://instacopyrighthelpteam.com/feminist_theory_social_work58qhr.pdfIn PDF document text
    • https://kokubexajaluk.weebly.com/uploads/1/3/2/6/132681668/gekenuvewitojixelume.pdfIn PDF document text
    • http://rewita.fun/what_do_i_read_after_the_trials_of_apollox7ymv.pdfIn PDF document text
    • https://cdn.sqhk.co/damukowabij/jOGZjf2/hungry_shark_world_hack_apk_ultima_version.pdfIn PDF document text
    • https://jupufafel.weebly.com/uploads/1/3/2/7/132740723/6f24f488b1582.pdfIn PDF document text
    • http://bettermoneytips.com/homeless_sex_offenders_californiab4w8o.pdfIn PDF document text
    • https://donedujawag.weebly.com/uploads/1/3/4/3/134315137/durureko-mobesad-renenuposare-rolofifu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464330/normal_6030506773a65.pdfIn PDF document text
    • https://puxezemugip.weebly.com/uploads/1/3/4/3/134311794/1469216.pdfIn PDF document text
    • https://cdn.sqhk.co/miviluwulux/hh1jhHV/video_maker_free_no_sign_up.pdfIn PDF document text
    • https://cdn.sqhk.co/leporolino/TjdmK38/dream_cruises_season_1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375504/normal_602c1de761d64.pdfIn PDF document text
    • https://cdn.sqhk.co/tefazaturar/9gi6gdB/educational_leadership_and_management_book_in_urdu.pdfIn PDF document text
    • http://svarka-aurora.online/lord_i_need_you_chords7tuyt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0001402a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1402A 5864 bytes
SHA-256: 2cea86c370d95790f9a77be4aa9ea5a05e7ec752c6532aac31d211b8c55f11f2
font_01_sfnt_off0001540f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1540F 10632 bytes
SHA-256: f896da8ba47ea13c50b13fd4ecd2eef37747206a1045995caae49b76a013ce8c