Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbc7a130109c7411…

MALICIOUS

PDF

76.2 KB Created: 2021-01-25 20:41:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6592408a79bba04689819188b8a12ef5 SHA-1: d140999201c6c71d6ad1d7c13d82efc221369840 SHA-256: fbc7a130109c741125b679c53aea1d5a19fbed14bb6cb207da0694fc3e5dadd8
274 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The sample is a PDF file flagged by multiple critical heuristics as malicious, including a redirector link, a link farm, and brand-impersonation credential phishing. The ML classifier also strongly indicated maliciousness. The embedded URLs and the nature of the heuristics suggest the PDF is designed to lead the user to malicious infrastructure, likely for phishing or to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://wisapemewe.weebly.com/uploads/1/3/4/7/134713478/9107670.pdf.
  • 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://traffmen.ru/123?utm_term=gmod+player+models+how+to+use In PDF document text
    • http://instgrmmverifiedbadge.com/strike_force_arcade_fps_dominator_ps4y7240.pdfIn PDF document text
    • http://naturwow.space/communism_name_meaning_in_urdu580zj.pdfIn PDF document text
    • http://igafnd.org/penguin_movie_amazon_prime_video7mgfi.pdfIn PDF document text
    • https://wisapemewe.weebly.com/uploads/1/3/4/7/134713478/9107670.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465012/normal_60049c534fcc3.pdfIn PDF document text
    • https://linerebe.weebly.com/uploads/1/3/0/8/130813546/bajur.pdfIn PDF document text
    • https://midejunefe.weebly.com/uploads/1/3/5/4/135400465/7651807.pdfIn PDF document text
    • https://limofagis.weebly.com/uploads/1/3/4/6/134640762/vezezumukutu.pdfIn PDF document text
    • http://my-favshopc.online/87215544310b27ck.pdfIn PDF document text
    • https://zoninezazazi.weebly.com/uploads/1/3/1/0/131070362/jazebagegorax-fanopakamil.pdfIn PDF document text
    • http://moreprodukti.com/disney_heroes_battle_mode_tier_list_august_2020ex3wa.pdfIn PDF document text
    • http://infokurs.design/jopujurugesixeribixaxalo6f6eo.pdfIn PDF document text
    • https://zezowamizafomex.weebly.com/uploads/1/3/1/3/131381240/42f7e38a7c5c1.pdfIn PDF document text
    • http://hotsales-com.xyz/knockout_bowling_pinsamm4x.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dumupa/christmas_cake_images_free.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/36310377970.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/dusk_till_dawn_piano_sheet_musescore.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/napelobapazanubiwe.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_off0000ec52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC52 5424 bytes
SHA-256: 417ea5269f0e799454eebd3fdcb8dcc3dc9dbf58e00f142e49b0155336ef572f
font_01_sfnt_off0000feae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAE 10860 bytes
SHA-256: 37dec7e49df17d1a42e855aae91cb1ce4af979af0c5e8f35c2160a7e6a69c246

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