Malicious PDF — malware analysis report

Static analysis result for SHA-256 0840841ce9618c3b…

MALICIOUS

PDF

75.7 KB Created: 2021-03-25 16:31:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e2b696876b39757637f7997bd76faa5d SHA-1: 2f16295b9919b89af1ecbde0cd90e7e98bec4fe1 SHA-256: 0840841ce9618c3bfc799a50f37754008f93b0238db4c9a85780b6e9cfc60fb8
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://pelibifir.ru/award?keyword=chemistry+buffer+solutions+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387709/normal_600e31b2e2560.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471710/normal_5ffa91d13da29.pdfIn PDF document text
    • https://cdn.sqhk.co/kiximele/Jgjiih0/58068110341.pdfIn PDF document text
    • https://cdn.sqhk.co/fumazuri/KiiNicB/71674253688.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501789/normal_5fdaa908c2f25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486566/normal_600bb8cee6d9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374852/normal_604d355a2bee5.pdfIn PDF document text
    • http://svoylend.xyz/riwudf8ky9.pdfIn PDF document text
    • https://cdn.sqhk.co/fewibefanid/1ghhgex/50160088265.pdfIn PDF document text
    • http://pocki.top/why_wont_my_netgear_router_connect_to_my_modem9mcxg.pdfIn PDF document text
    • https://cdn.sqhk.co/godezixibufo/jbggqia/50309211353.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9ef77391-fdd1-48d8-ba15-364b07375333.filesusr.com/ugd/ebefdf_264d503a446e44b0ba10a863724bf4f8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/miss_peregrine_home_for_peculiar_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/narodakemuga.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/charkha_mera_rangla_punjabi_song.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/ripevala.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/3d_warehouse_sketchup_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/vavonoras.pdfIn PDF document text
    • https://cb8582fb-ab29-4f13-bfd4-623ca244ab52.filesusr.com/ugd/d61b30_6f1700c9ee324b13b72f75fcf312706a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/toguvaju/chloroform_for_endodontics.pdfIn PDF document text
    • https://63c5840e-267c-49ed-94d3-fc9f9d8b9c0b.filesusr.com/ugd/8c5bc8_a79008bfc35643449703b5486f5792d7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/rexamonigedukexuli.pdfIn PDF document text
    • https://e4fb9bf1-a3d6-4767-9bf2-2a1021e5dc09.filesusr.com/ugd/53cfc7_b4b6ef115d71494f91126a7b645810a8.pdf?index=trueIn PDF document text
    • https://50bf384a-eeac-4f26-a262-e2ba1a5e00ba.filesusr.com/ugd/17159d_3c2a8f92232d460d9301cbaf22e3841f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/xiviniwovivib.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA60 5216 bytes
SHA-256: c720e08ad5092d2f6b167eb13e687eb113c0dd55805e2be9f318cc403e15535b
font_01_sfnt_off0000fbf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF3 10812 bytes
SHA-256: f6f873d84a76e117cdc44240232eec2b57acf56f7e50af983d5646f3bdc6978c

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