Malicious PDF — malware analysis report

Static analysis result for SHA-256 67af62a08c67e385…

MALICIOUS

PDF

79.7 KB Created: 2021-03-31 03:42:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f40315401ce931547e329b7de41e7cc SHA-1: 2f64ea7de839183fc1ad82f6c0b7b619034b2c8f SHA-256: 67af62a08c67e38516b5bf6e1c2fdd5833346c20caf226bbd4f9af9c67554d57
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 point to potentially malicious or SEO-farmed content, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV also flagged this PDF as malicious. The embedded URL and the document body suggest a lure related to 'Ap grama sachivalayam syllabus pdf', which is likely a pretext to drive traffic to the malicious domain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://botokaw.ru/123?utm_term=ap+grama+sachivalayam+syllabus+pdf
    • https://cdn-cms.f-static.net/uploads/4417534/normal_6020059378ab2.pdf
    • http://nesorus.mywebcommunity.org/cambridge_primary_mathematics_stage_5_learner_s_book.pdf
    • https://zuvitapud.weebly.com/uploads/1/3/1/4/131406427/jobuli-zegezalej-wutozakolapetan-lojalixutok.pdf
    • https://static.s123-cdn-static.com/uploads/4421462/normal_5ffe15038e7e0.pdf
    • http://nabavawuzafurur.mygamesonline.org/navulix.pdf
    • https://cdn-cms.f-static.net/uploads/4445880/normal_60117e4045e3d.pdf
    • https://famojiwogupoj.weebly.com/uploads/1/3/2/3/132303340/bc32faa84.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/senodiw/certificado_medico_legal_de_lesiones.pdf
    • https://31f314b5-0768-4c24-bd49-4596ea953b46.filesusr.com/ugd/85a4b1_3c17db58f50d443a93c1b0a184167ba6.pdf?index=true
    • https://s3.amazonaws.com/xuzakob/10417816900.pdf
    • http://kuxemozoxabonag.onlinewebshop.net/zexisukasuxe.pdf
    • https://s3.amazonaws.com/tedowafomaru/cymatic_audio_lp-_16_manual.pdf
    • https://s3.amazonaws.com/toliwudalamem/beholder_full_game_android.pdf
    • https://s3.amazonaws.com/kefiperizonofu/rejafupidodibubabajazapiv.pdf
    • https://s3.amazonaws.com/turip/89845294212.pdf
    • https://a72b158e-cead-41d6-a0b3-8518216316a4.filesusr.com/ugd/35c6e2_605d651023bb41d9ab2225368f4ff1ef.pdf?index=true
    • https://s3.amazonaws.com/ravuxudibure/illaoi_combo_guide.pdf
    • http://vuzuwukef.atwebpages.com/95058810108.pdf
    • https://s3.amazonaws.com/mudurixo/18769092498.pdf
    • https://s3.amazonaws.com/sixenogafopoj/jidexilupepis.pdf
    • https://s3.amazonaws.com/telasebisu/camelot_season_2_full.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee09.bin
3fdc5584a676feb1cd24db120fa52545dae23628d055b57fbec048a21e7fa3ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE09 5328 bytes
font_01_sfnt_off00010023.bin
64a5bad16442edff7d8889cf718c8ff8033c0ea9c54d85d655bde851d3e472a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10023 10360 bytes
font_02_sfnt_off00012382.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12382 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.