Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1c8a34fb53bc31b…

MALICIOUS

PDF

90.9 KB Created: 2021-03-20 18:07:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 34e177fca456c0a8e1624e7672b251dd SHA-1: b3d456924ded4db1b0d74f1e2dd664ffa5f4d422 SHA-256: c1c8a34fb53bc31b028e77c20cea979f9ea8fce6b4884e3d271944b0acae7a5a
126 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on disposable domains and utilize UTM parameters, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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://fokemale.ru/strik?utm_term=fifty+shades+of+grey+chapter+24+summary PDF link annotation
    • https://tabupuja.weebly.com/uploads/1/3/4/6/134647436/zetirupalilubij.pdfIn PDF document text
    • https://cdn.sqhk.co/mamevugixej/XgjyFXS/totikawekuz.pdfIn PDF document text
    • https://tukobigerokigab.weebly.com/uploads/1/3/4/6/134653943/tatigiripuvenivafogo.pdfIn PDF document text
    • https://labopepiw.weebly.com/uploads/1/3/4/7/134747507/lapisefonetefo.pdfIn PDF document text
    • http://zoxogadi.22web.org/accidentally_took_double_metformin.pdfIn PDF document text
    • https://rurusoweloxefug.weebly.com/uploads/1/3/3/9/133989150/pidafededow.pdfIn PDF document text
    • https://cdn.sqhk.co/wosipuvetot/Ghjk1gd/spider_stickman_rope_hero_gangster_crime_mod_apk.pdfIn PDF document text
    • https://jugomezaxazodo.weebly.com/uploads/1/3/5/9/135994004/jogis_gateven_potimu_lanon.pdfIn PDF document text
    • http://fosipuzo.mypressonline.com/what_were_the_key_ideas_of_the_magna_carta.pdfIn PDF document text
    • https://cdn.sqhk.co/lobinazema/Sl4jihj/tumblr_drawings_easy_sad.pdfIn PDF document text
    • https://cdn.sqhk.co/rorifugera/igiegce/vikalivuvuni.pdfIn PDF document text
    • http://nekutijefaxikar.iblogger.org/42620836446.pdfIn PDF document text
    • https://cdn.sqhk.co/lisutovudaf/A0figjh/dining_near_me_outdoor.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/zusevamasor/autodesk_vault_basic.pdfIn PDF document text
    • https://8eefcaf3-52f5-4123-8be5-b1f0aaeea45e.filesusr.com/ugd/1d3654_bd75728f8a0949e5a2767d47a933b2a4.pdf?index=trueIn PDF document text
    • https://f110cc6a-49d6-427c-9ab6-a3a4d323b004.filesusr.com/ugd/9e53d4_a4e3026a3a6a416e9717c3002af6dd88.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/woborovi.pdfIn PDF document text
    • https://0f4267a5-27df-427f-b7ff-de3c6d4a4cd0.filesusr.com/ugd/9e4921_b00ebf0db9a4485ca0ed8f9473e1ecf5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/risisipajole/31055927057.pdfIn PDF document text
    • http://mimewimirul.rf.gd/82973245685.pdfIn PDF document text
    • http://gozidonozali.myartsonline.com/morixunadulisikuzo.pdfIn PDF document text
    • http://zubikexef.rf.gd/benegajepofudi.pdfIn PDF document text
    • http://nawonuzegajosi.epizy.com/88397005428.pdfIn PDF document text
    • https://a001dc82-f31e-4944-9b76-0a8e602b6855.filesusr.com/ugd/e4ee87_83d1d10c7ca441f784f9ff2e630e7ed2.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_off00012596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12596 5812 bytes
SHA-256: 3c7bc8eb216cdc7b8ef858b721874d98eaf92658dbbf34cceb5bb352f829f16b
font_01_sfnt_off00013956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13956 10660 bytes
SHA-256: df99dd3a83a00c8ecb3601963693406dc3aa5d3b34e1bd76a7a73b646bcd4da3

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