Malicious PDF — malware analysis report

Static analysis result for SHA-256 08a7cf84819f0193…

MALICIOUS

PDF

68.0 KB Created: 2021-03-12 11:00:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 05bd2ead4941263189249fab1f59c593 SHA-1: d9f7df8aac58eeed83be591c127cb942cc80ef75 SHA-256: 08a7cf84819f0193b00ccb4b93be7c650fa312daefb42c1d7ba344c9139729c4
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs, many of which are hosted on disposable domains or use UTM parameters, suggesting a tactic for SEO manipulation or phishing. The presence of embedded URLs and the overall structure point towards an attempt to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jottigo.ru/123?utm_term=balkanska+mafija+serija PDF link annotation
    • https://morimisinasezub.weebly.com/uploads/1/3/1/8/131856414/dubibido_soruto.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/h8FW1jd/orange_money_transfer_ahmedabad.pdfIn PDF document text
    • https://vevofuxideg.weebly.com/uploads/1/3/1/4/131405958/guzixavuwupofa-sadiruweniwaxud.pdfIn PDF document text
    • https://wuzajamepoxomis.weebly.com/uploads/1/3/4/0/134096323/9315c.pdfIn PDF document text
    • https://mevajivikupewog.weebly.com/uploads/1/3/0/7/130775189/jofogidix.pdfIn PDF document text
    • https://fetezubusob.weebly.com/uploads/1/3/2/6/132681625/917424.pdfIn PDF document text
    • https://kobokudebixisog.weebly.com/uploads/1/3/5/3/135390699/94f580a6d1b34e1.pdfIn PDF document text
    • https://tesazovefikuk.weebly.com/uploads/1/3/1/4/131408970/36af78.pdfIn PDF document text
    • https://viwosakizipisot.weebly.com/uploads/1/3/5/3/135321869/gajanujax.pdfIn PDF document text
    • https://nifevokore.weebly.com/uploads/1/3/1/4/131437532/pedutifufogugezurig.pdfIn PDF document text
    • https://cdn.sqhk.co/zofonabiz/eii0bSW/how_to_split_sound_clips_in_imovie.pdfIn PDF document text
    • https://cdn.sqhk.co/xodakebebit/gfidxHo/world_cup_qualifiers_matches_america.pdfIn PDF document text
    • https://povurumupun.weebly.com/uploads/1/3/4/8/134884194/56a72cb9.pdfIn PDF document text
    • https://berekiba.weebly.com/uploads/1/3/1/4/131482976/575699.pdfIn PDF document text
    • https://sojabejob.weebly.com/uploads/1/3/4/8/134890412/vejurax-nuvenaweve-kudoxozinuvivad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://13adc596-845f-4f4a-b539-e2c04a0a4b5a.filesusr.com/ugd/6e2da7_0d92d7092cd041aab2b2fdaceca10594.pdf?index=trueIn PDF document text
    • http://zegaruso.rf.gd/76236127443.pdfIn PDF document text
    • https://4de1274e-a26b-4e71-a0d1-d86f0cfee7ee.filesusr.com/ugd/ee4d88_281610fa550a4672992cbe89dd9f9a96.pdf?index=trueIn PDF document text
    • https://e86c6366-0652-46cb-9e1f-5633a133dba9.filesusr.com/ugd/510a18_9c9372f8621f43c38281f6d1e72e3d6b.pdf?index=trueIn PDF document text
    • https://45f61934-b4a1-4335-a9e3-e142d9465b5b.filesusr.com/ugd/0dd040_542f352e49c34058b18949e57df2a678.pdf?index=trueIn PDF document text
    • http://galapeb.epizy.com/60708816441.pdfIn PDF document text
    • http://sizojike.rf.gd/simultaneous_equations_worksheet_with_answers.pdfIn PDF document text
    • https://0eb00d84-361a-45dc-b346-1af5c8eb785c.filesusr.com/ugd/d79848_1e584cc33a3d43d4b95c41874a9d4383.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_off0000cbf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF3 5104 bytes
SHA-256: b8e18255f60f38b53d1647643a304736c1d453c64ced9d713380c974b6225e98
font_01_sfnt_off0000dd3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3D 11104 bytes
SHA-256: fda3a985c0ae5d3a12692559c58a70c1c89557299168d1048b446530204128f6

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