Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9f97792a182fe93…

MALICIOUS

PDF

100.4 KB Created: 2021-03-19 21:07:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3335ec69dded68f3513c53d998821b1e SHA-1: d848dd2ce783e6574f37eaf364bdeb8abc669f30 SHA-256: d9f97792a182fe93a893ea022a763290f5482650c2ea788f0bde12acc76de663
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable hosting and redirector infrastructure, indicating a link farm designed for malicious purposes. The presence of a URL with 'netflix error' in the UTM term suggests a phishing lure. ClamAV and ML classifiers also flagged this PDF as malicious, supporting the phishing and potential malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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.
  • 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://yafferge.ru/123?utm_term=netflix++error+10016-+fail In PDF document text
    • https://mugafurevokez.weebly.com/uploads/1/3/4/8/134894013/cc1942e481.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/iTdihjc/41186400183.pdfIn PDF document text
    • http://zekagepalido.iblogger.org/62187628491.pdfIn PDF document text
    • https://gixobuwek.weebly.com/uploads/1/3/2/8/132815317/4542438.pdfIn PDF document text
    • https://cdn.sqhk.co/tusufawenu/jf5hdhg/12857621479.pdfIn PDF document text
    • http://milafikolume.iblogger.org/86899818874.pdfIn PDF document text
    • https://cdn.sqhk.co/nujidegowupi/gikgjgG/i_gladiator_apk_award_hello_neighbor.pdfIn PDF document text
    • https://cdn.sqhk.co/pewowutefiw/uVhjNW5/filudo.pdfIn PDF document text
    • https://cdn.sqhk.co/supesuvepo/gdXnrv6/passion_red_color_wagon_r.pdfIn PDF document text
    • http://nafaguxidu.iblogger.org/careers_gov_application_form.pdfIn PDF document text
    • https://cdn.sqhk.co/pododefakes/fhEViaY/autodesk_autocad_electrical_2016_tutorial.pdfIn PDF document text
    • https://cdn.sqhk.co/sevigexew/g2Rhgha/sexakegisiga.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuzuxoluzetirig.rf.gd/buvajezixotizajewet.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/kasikivawuzani.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/formal_dresses_for_rent_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/rakusenowukitaropunafixow.pdfIn PDF document text
    • http://jipudovisubu.rf.gd/80935155066.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/sogibatevigenogulibi.pdfIn PDF document text
    • http://jukigegamoma.epizy.com/the_vegetarian_butcher_nuggets_preis.pdfIn PDF document text
    • http://sufojokene.rf.gd/how_long_does_it_take_to_dry_beef_jerky_in_a_dehydrator.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BF 30844 bytes
SHA-256: 37c3eeabc20a1330308bcba748303bf034c4944f3492ce205cd2eb679c773c4b
font_01_sfnt_off00015019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15019 5000 bytes
SHA-256: 3140d32ef666ef5c08d38c1b179b332c7dc50833a585954df15ec5af1b7420cc
font_02_sfnt_off00016142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16142 10104 bytes
SHA-256: 88bf3d37d84ad6e0880a718a994078cf4e2c0fe6bbb39b268c5423d9d4a3cb2d