Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e239c01ace9daaf…

MALICIOUS

PDF

73.3 KB Created: 2021-03-01 16:48:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 98fa37a658c2ef41502c51a2e511c1e7 SHA-1: eefa9743696a251b9524260e826744b43c207e58 SHA-256: 7e239c01ace9daafefcfd25937850de60d8eb78c07887ecea0b54f41d20ac42e
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV and ML classifiers identified the file as malicious, specifically a phishing trojan. While no scripts were directly extracted, the presence of numerous external URLs suggests a potential for downloading further malicious content or redirecting users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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://xezojetit.ru/strik?utm_term=sharp+microwave+drawer+reset PDF link annotation
    • https://pawiwojofidinof.weebly.com/uploads/1/3/4/4/134458390/7585665.pdfIn PDF document text
    • https://kaperimivegorew.weebly.com/uploads/1/3/4/3/134371305/8c9480.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475859/normal_5ffcc77a27610.pdfIn PDF document text
    • https://cdn.sqhk.co/zupivikeg/fE0jgCC/monster_hunter_generations_ultimate_guide.pdfIn PDF document text
    • https://femesavez.weebly.com/uploads/1/3/1/3/131383434/petol-gotarimar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471682/normal_601b04a0d8f37.pdfIn PDF document text
    • https://sekinejifupom.weebly.com/uploads/1/3/5/3/135350217/dbb89bbe85cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500001/normal_5ff345ff156c4.pdfIn PDF document text
    • https://cdn.sqhk.co/pafevola/jfjcRge/huawei_health_app_4._0._0_download.pdfIn PDF document text
    • http://rusakova.space/cs6003_ad_hoc_and_sensor_networks_unit_1_pptghkwh.pdfIn PDF document text
    • https://cdn.sqhk.co/wexovezojab/iJ1xIig/mini_sumo_robot_yaz_l_m_arduino.pdfIn PDF document text
    • https://cdn.sqhk.co/dedikunakudu/icrqjfd/90916936574.pdfIn PDF document text
    • https://pukelubaluwo.weebly.com/uploads/1/3/4/7/134741361/9b26128c6b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461744/normal_6010c6791c821.pdfIn PDF document text
    • http://eushopvmn.site/5144165970704c7e.pdfIn PDF document text
    • https://zuwulixomelonib.weebly.com/uploads/1/3/4/3/134385653/kaxirofi_dunuxunag_pifesid.pdfIn PDF document text
    • http://zelopaqq.xyz/varasedoferazoligaxikagm7fu.pdfIn PDF document text
    • https://pusobufuronuwu.weebly.com/uploads/1/3/4/4/134475569/pogupazedemok.pdfIn PDF document text
    • https://nutomejeti.weebly.com/uploads/1/3/4/7/134702699/tevoposovenodo_tijagu_jetugavewinus.pdfIn PDF document text
    • https://tuxewuwa.weebly.com/uploads/1/3/4/7/134776055/moxejilikevimafesuz.pdfIn PDF document text
    • http://mattelipsticks.site/snappy_salads_dallas_downtown1fsu5.pdfIn PDF document text
    • https://wulukapuw.weebly.com/uploads/1/3/0/7/130740123/lovibokosus_nifakituto_vilamef_pozuraku.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_off0000e053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE053 5536 bytes
SHA-256: 50473c6b6a557ca5772de2154ece08d46254b758936871b755a2094e54342808
font_01_sfnt_off0000f30f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30F 10680 bytes
SHA-256: 1d186b3eb0b6a34756b5828b4ae09a548a56c0f37eccae6e8eacdcafad5bfc8f