Malicious PDF — malware analysis report

Static analysis result for SHA-256 060a02bbf5cb04ac…

MALICIOUS

PDF

104.4 KB Created: 2021-05-03 10:02:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e032edbe870b0b5616471521c977f9fc SHA-1: 59339f8ffc656a153a77131a4a4dcb87b98b257f SHA-256: 060a02bbf5cb04acce8e6bb3b8316bb88e9b693f7f2e22ef67b878f19e5780ae
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/strik?utm_term=tim+o%2527brien+the+things+they+carried+chapter+2+summary PDF link annotation
    • http://sellforce.ru/rajewubulakuramated2ma5v.pdfIn PDF document text
    • http://otshelnik.net/544531044570y6ni.pdfIn PDF document text
    • http://soldonlittleton.com/80244569260i0sqv.pdfIn PDF document text
    • https://varukixenusenat.weebly.com/uploads/1/3/4/7/134700479/buwagodoxabazur.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetona/KHJhb6L/lily_s_garden_ads_meme.pdfIn PDF document text
    • https://feraresafobigim.weebly.com/uploads/1/3/0/8/130813798/midedu.pdfIn PDF document text
    • https://cdn.sqhk.co/rorefevobo/iifj2CW/larva_heroes_battle_league_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/vobilurerire/eqifijp/78037048013.pdfIn PDF document text
    • https://cdn.sqhk.co/mixaluwekitu/Wnl1Mje/68839425655.pdfIn PDF document text
    • https://nugilura.weebly.com/uploads/1/3/5/3/135317706/6c4941ae.pdfIn PDF document text
    • https://cdn.sqhk.co/nuponoviva/F5mPMjd/53896094721.pdfIn PDF document text
    • https://xupulepil.weebly.com/uploads/1/3/4/3/134322414/vonirexakisele.pdfIn PDF document text
    • https://famixarusefon.weebly.com/uploads/1/3/4/3/134396739/teletajelobabanupin.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/jupoti/mosof.pdfIn PDF document text
    • https://4bbf79d8-97e4-42de-9a75-948158c354f0.filesusr.com/ugd/52f5d3_f7991600ad524b6684417bb1aadcef44.pdf?index=trueIn PDF document text
    • https://2e5cbe44-7de3-4e3f-b94c-8a8567814465.filesusr.com/ugd/f96b02_8d9bfe1602f545c5b83ffb9c8eaa1b5c.pdf?index=trueIn PDF document text
    • https://75e6061f-eb7a-4ce8-b546-077bf96366c3.filesusr.com/ugd/2dfd19_631ebcd0413145ce8ee245179d951c13.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a870e703-d6a0-4007-adff-378e99ede818/65884097576.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c896f2b-b94a-4ce2-be38-411088ebcf09/dolce_vita_spa_prices.pdfIn PDF document text
    • https://436240a4-ef10-404e-ad90-c5cab949c7af.filesusr.com/ugd/3fb742_a1afe75659904644a2da86957746830a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/63d39c46-c42d-4e6c-b564-c35c0a50707b/kixeworanok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10194440-1425-4afc-89b4-7b1f6cbc0cb9/ridixadokutajowimiwiriwo.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/circuits_worksheet_ks3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddfe053b-9650-4fc6-844a-5411a21a9c22/how_to_power_down_an_adt_alarm_system.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000143cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143CD 5812 bytes
SHA-256: e676b3ef0780c831867628e77a96b9e587b8d8bbb22444d5bbcc5dfb72e8d059
font_01_sfnt_off0001577d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1577D 11444 bytes
SHA-256: 96d0e91776d493b53d925382618fdddb3126eecfcb5d7f37773337633bc45ff5
font_02_sfnt_off00017ec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17EC2 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501