Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b363350b26d0f28…

MALICIOUS

PDF

86.4 KB Created: 2021-03-23 11:15:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d3436ca967751a27c1716582f7d8c7de SHA-1: 5aa72dd96528532a488d27949b717868196ce62a SHA-256: 9b363350b26d0f281ea77d51fde7c694eef592b7e148dae1fd2557f52f94e959
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • 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.
  • 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://ponafet.ru/wix?keyword=disciplined+trader+book+pdf PDF link annotation
    • https://cdn.sqhk.co/revipidamog/jDYQjeZ/92391548248.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/AibQ5uY/3914907760.pdfIn PDF document text
    • https://cdn.sqhk.co/kufusivekogo/Jpvhggd/jutusukatokilezowizipuz.pdfIn PDF document text
    • https://cdn.sqhk.co/kamupudoro/BRKsjje/vosamaranometabemasad.pdfIn PDF document text
    • https://cdn.sqhk.co/zoluxoni/5hhhhGM/88929796092.pdfIn PDF document text
    • https://cdn.sqhk.co/bisuligiga/mAgjmmc/18086261176.pdfIn PDF document text
    • https://cdn.sqhk.co/kolokejo/jaMdFjh/zobenijijoxinanumez.pdfIn PDF document text
    • https://cdn.sqhk.co/gubujurit/eQghtPx/nesab.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/gizonukorad/list_the_5_principles_of_agile_methods.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/o_que__o_marketing_digital_qual__a_sua_utilidade.pdfIn PDF document text
    • https://0926596c-b1e6-4473-87d6-fed2e709bfeb.filesusr.com/ugd/e2a635_d93cb71579f34b588b6bf1aaa44d00ee.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mufukep/adobe_photoshop_express_apk_uptodown.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/56075756987.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/browsing_history_firefox_android.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/the_power_of_love_celine_dion_songtext_deutsch.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/rupinder_gandhi_2_all_song_free.pdfIn PDF document text
    • https://64e18f06-8a0e-4dc1-8427-9dd81b4bff36.filesusr.com/ugd/baa514_0b4a8aed2abc4c279c34c3ef952a4cff.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/ballroom_blitz_tab.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/business_information_technology_degree_careers.pdfIn PDF document text
    • https://34570882-574e-4d25-8c0e-d8b9b6c2967f.filesusr.com/ugd/cb2bed_454e96c1aabb4858a850ef0a63ac3806.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/toguvaju/63004016565.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/pobabugefesenivawoturube.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/chitralahari_movie_audio_naa_songs.pdfIn PDF document text
    • https://bc088afb-3237-4fec-a528-a5d3d6736f7f.filesusr.com/ugd/d55797_54cff154ae944d97adf8bc5ecb8e5b5e.pdf?index=trueIn PDF document text
    • https://64e18f06-8a0e-4dc1-8427-9dd81b4bff36.filesusr.com/ugd/baa514_f54b60bc9550489fa7fe1151616abaf6.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00012397.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12397 21760 bytes
SHA-256: ec59ba34490ce9d0754d79700081dfa7409672d98a0c4bb684545851c505400b
font_00_sfnt_off0000ebb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB4 5352 bytes
SHA-256: ad059cb2a030f6f7867a3e5839a4bfbdc542f1058b90346e2cc7d4ee4d562950
font_01_sfnt_off0000fdfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFA 11004 bytes
SHA-256: f5a8767679ab76065f44ceb3be5b872e9a64c76cfc54363be48a8f6a4beac8e2

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