Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cc692c9c7730218…

MALICIOUS

PDF

82.9 KB Created: 2021-03-16 16:01:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: eda0c601c4d7e44932eec8f1c024f2f3 SHA-1: 5fcb29bad7f6a871200124954ca4bd4573791a52 SHA-256: 0cc692c9c77302182380248dcf12e3aa2caddcbbf71800e0767ac5bebc496fb7
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm designed to distribute other malicious content. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate this behavior, with URLs like 'http://gajibapudi.rf.gd/jabogedidigirekez.pdf' being prominent. The ML classifier and ClamAV detection strongly support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://golowaki.ru/wb?keyword=microsoft%20excel%20standard%202013%20product%20key PDF link annotation
    • https://cdn.sqhk.co/gijimexuv/fjdgdib/bavorupetuvuvonisisevu.pdfIn PDF document text
    • https://cdn.sqhk.co/pibavasedegi/9ibzajh/46508129739.pdfIn PDF document text
    • https://cdn.sqhk.co/gixotagokezu/fmjbgjX/bloons_td_5_hack_apk_android_oyun_club.pdfIn PDF document text
    • http://didazema.mypressonline.com/arcus_senilis_adalah.pdfIn PDF document text
    • https://cdn.sqhk.co/lodesejidi/jc3mij3/ganekelezikejitegasawasur.pdfIn PDF document text
    • http://tryici.xyz/suvuzekajuribmhgi.pdfIn PDF document text
    • https://rujusuxiledajo.weebly.com/uploads/1/3/4/8/134861970/fatuxugagazufoz.pdfIn PDF document text
    • https://gebobofivogaxe.weebly.com/uploads/1/3/5/3/135308574/kogisuz-xupokikedoleve-siwom-pewode.pdfIn PDF document text
    • http://kekemubitaf.iblogger.org/gifatatebak.pdfIn PDF document text
    • http://sq11mini.com/julazubobijatowusurougtq5.pdfIn PDF document text
    • https://raxeruzuk.weebly.com/uploads/1/3/4/7/134743740/1011844.pdfIn PDF document text
    • https://wudumimimi.weebly.com/uploads/1/3/4/3/134356267/8157dc951.pdfIn PDF document text
    • https://cdn.sqhk.co/gutemokerezo/i41mjea/beach_buggy_racing_ps4_split_screen.pdfIn PDF document text
    • http://lesalufijo.iblogger.org/zigosuk.pdfIn PDF document text
    • http://zanodopowe.sportsontheweb.net/90242475731.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gajibapudi.rf.gd/jabogedidigirekez.pdfIn PDF document text
    • http://sufapasikan.epizy.com/mulumusujufanidorojen.pdfIn PDF document text
    • https://1b3fde16-7575-45ba-b40e-8916c64185ca.filesusr.com/ugd/8874e8_a59b2f9d53694ff1a51f69d31957d65e.pdf?index=trueIn PDF document text
    • http://vujapoguxesak.myartsonline.com/rulemaxe.pdfIn PDF document text
    • https://f3874c2d-c116-49c2-b7b6-9300dc8fc43e.filesusr.com/ugd/b11f6d_a42d433794624c358e0905194ca793be.pdf?index=trueIn PDF document text
    • http://kaxegukepoxar.rf.gd/linksys_ea7300_wont_stop_blinking.pdfIn PDF document text
    • https://8f0c9b82-9570-4081-bbb7-5e23a534ea09.filesusr.com/ugd/7008f3_6b1fbd45a7cc4fe5bd38a88b910afe5d.pdf?index=trueIn PDF document text
    • https://f4b9ed98-44c1-44e6-9966-d9817cd43de7.filesusr.com/ugd/9ced5d_b9014f0ab7c54281a90642a38a414b7e.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_off000104d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D1 5876 bytes
SHA-256: 5cd29b5eb5440933a3a0916bddac1e6a3508f891c4649ba2a50b9d49b6810b77
font_01_sfnt_off00011905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11905 10888 bytes
SHA-256: 80dfb5e279e96648bc5645d7395c39fbc70ffc946efd7453de5dd4f00fcebf08