Malicious PDF — malware analysis report

Static analysis result for SHA-256 34cc97648bd73428…

MALICIOUS

PDF

124.9 KB Created: 2021-03-22 21:25:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ce42eb843dbd8de4a007feb69c1b0860 SHA-1: 7b53ea9e0f37d5307cc7b5cb1fbcb2ddfd828846 SHA-256: 34cc97648bd7342811c993ceb387001179a4b5185e4183558a43b0ff4d7d3a53
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-themed, suggesting an attempt to drive traffic to various websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and heuristic firings point towards a malicious document designed to exploit users through link farms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/award?keyword=vatican+2+summary+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386837/normal_60480d88bc2b2.pdfIn PDF document text
    • http://msertis.xyz/new_apostolic_reformation_churches_near_mevce4y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383692/normal_6040e2687cae9.pdfIn PDF document text
    • https://kapegidaboxisi.weebly.com/uploads/1/3/4/5/134527108/eb56a.pdfIn PDF document text
    • http://rollernefritmassage.xyz/anitha_o_anitha_telugu_song_freep4gaz.pdfIn PDF document text
    • https://wilubiluzitewi.weebly.com/uploads/1/3/1/4/131413550/pogotofobupud.pdfIn PDF document text
    • http://fastpysystem.online/togu_challenge_disc_2._04h8r3.pdfIn PDF document text
    • https://liwevapazu.weebly.com/uploads/1/3/1/0/131071299/nubivitabiza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495393/normal_5ff2d315aac1a.pdfIn PDF document text
    • https://jafumatelitu.weebly.com/uploads/1/3/4/8/134884178/puwetamusamozazebi.pdfIn PDF document text
    • http://f13x.xyz/new_oxford_style_manual_nzo56t2.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/bulujono/twilight_graphic_novel_volume_2_read_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0636a3f-71b4-467b-bb67-aff227757b25/23962292269.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/cyberflix_tv_3._1._8_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d719de5a-8423-47e6-b118-48818c5c33e6/86099765554.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/how_many_i_am_in_the_book_of_john.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8944ebc5-3cf8-4f12-a222-ee5687de27f5/garmin_vivofit_jr_replacement_bands_star_wars.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c28401f1-65eb-4418-ba8c-4b29559a2386/papozedunefi.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/ferogitozeveb.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/lewamagisisipimofa.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_off0001aa10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA10 5468 bytes
SHA-256: e699e5fa1a5498e43fecee4b1a243b441c4ee5afcf83e99390257bb5e0393eb3
font_01_sfnt_off0001bca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BCA2 13436 bytes
SHA-256: d1fbc7f384d221fc55ddb3f8f179d30424b10cfbacf5df4eb7307ba50305ee0d

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