Malicious PDF — malware analysis report

Static analysis result for SHA-256 144f70820e97c356…

MALICIOUS

PDF

86.1 KB Created: 2021-03-20 11:54:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 00ff396981d52b1be06067cfcba0af6f SHA-1: b99c18d51808f8d0b40818681ab1be1ae5737387 SHA-256: 144f70820e97c35698f36dd0a855431d8e94766fd84eef829a37d3861c71c0fb
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, with the primary URL pointing to a search query for 'fake gps location apk for iphone'. This suggests a phishing or scam attempt to direct users to potentially malicious content. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

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
  • 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://seumenha.ru/wix?keyword=fake+gps+location+apk+for+iphone PDF link annotation
    • https://cdn.sqhk.co/jasolizilaf/jbjcsii/lego_marvel_superheroes_cheats_ps3_invincibility.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366005/normal_604a9ad7d9f31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417037/normal_600fa5e56ea58.pdfIn PDF document text
    • http://kotudekudoges.getenjoyment.net/mumovanime.pdfIn PDF document text
    • http://foramodosug.mygamesonline.org/animal_farm_next_to_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392864/normal_600f60f79e79b.pdfIn PDF document text
    • http://fusekimutoxi.sportsontheweb.net/black_belt_karate_the_intensive_course.pdfIn PDF document text
    • https://cdn.sqhk.co/susiwebuvowo/icidhbx/iphone_x_text_tones_not_working.pdfIn PDF document text
    • https://cdn.sqhk.co/vonewesipan/gi5jgzp/gopixa.pdfIn PDF document text
    • https://cdn.sqhk.co/zativojor/ijiyaja/homeschool_curriculum_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/nugizape/tkihij7/4114767588.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zesinule.rf.gd/clorhidrato_de_metformina_en_ingles.pdfIn PDF document text
    • http://vujiwexamofone.rf.gd/bagaguxogometoga.pdfIn PDF document text
    • https://dc010c70-835d-4b56-8cb0-1e1bda7cab64.filesusr.com/ugd/fb576b_4ff3c6792e5f4213aac46cf4dc77afda.pdf?index=trueIn PDF document text
    • https://9e730ba1-499c-413e-9a09-8a81f8121270.filesusr.com/ugd/0a0016_8b62fd00f44b48c2b595fd6c7e7ba39c.pdf?index=trueIn 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_off000112d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D2 5296 bytes
SHA-256: 91f86ad28a16aca34c8b19f929498de5e3627e3ab5cc0228fe41153af0540d3b
font_01_sfnt_off000124dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124DD 11436 bytes
SHA-256: afbcf9329dd546934328bab4f1f7227b194d02947be9086af9c3778a1dc2ddc0

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