Malicious PDF — malware analysis report

Static analysis result for SHA-256 06e94e87ccac04c1…

MALICIOUS

PDF

88.2 KB Created: 2021-03-21 11:16:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 901cd20c6ef251f42712f36e8957659b SHA-1: b2106acc7b39a447270a70abd3e338002fbbcb0a SHA-256: 06e94e87ccac04c133c48bb3a1a8c7defefd21a90d8d85a5af1375451246299e
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a PDF link farm. This suggests a malicious intent to manipulate search engine results or redirect users to potentially harmful content. The ClamAV detection and ML classifier further support its malicious nature, indicating it's likely a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://vilenefex.ru/123?utm_term=date+format+in+tableau+calculated+field PDF link annotation
    • https://cdn.sqhk.co/noviraxat/Vwgd8ij/yellow_pages_reverse_lookup.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/ije4opB/100_hits_rock.pdfIn PDF document text
    • https://cdn.sqhk.co/nezusoxe/hgifXgg/dead_effect_2_apk_obb_revdl.pdfIn PDF document text
    • https://cdn.sqhk.co/nuxarufodir/hhgg7if/spongebob_game_frenzy_mod_apk_1._5._2.pdfIn PDF document text
    • https://cdn.sqhk.co/dikozogub/P8ib2ge/gobojer.pdfIn PDF document text
    • https://kurixaxewa.weebly.com/uploads/1/3/1/3/131383664/4d025b01eef.pdfIn PDF document text
    • https://cdn.sqhk.co/tirinakiweda/QVhgZ3B/guvijuwuzimugoxa.pdfIn PDF document text
    • https://cdn.sqhk.co/lilanoto/iaBX9Ut/player_tracker_clash_of_clans.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwifoviwalo/gCDZgg5/36081399470.pdfIn PDF document text
    • https://cdn.sqhk.co/fejisedetu/gcJUcgf/bunekeragi.pdfIn PDF document text
    • https://cdn.sqhk.co/vizinifum/pgfdjeZ/dynamons_world_2_by_kizi_mod_apk.pdfIn PDF document text
    • https://fulojexerewo.weebly.com/uploads/1/3/5/3/135345176/3165985.pdfIn PDF document text
    • https://cdn.sqhk.co/puranajav/rOhjie6/daredevil_season_1_episode_1_parents_guide.pdfIn PDF document text
    • https://bujivopipagafo.weebly.com/uploads/1/3/5/3/135321681/3cd490fd96.pdfIn PDF document text
    • https://cdn.sqhk.co/bumogebiz/jeheKVL/kikarumetudabovu.pdfIn PDF document text
    • https://cdn.sqhk.co/zutujodara/cjdwjhZ/mijiwelira.pdfIn PDF document text
    • http://gimoduzideg.iblogger.org/ritetemp_thermostat_6025.pdfIn PDF document text
    • https://cdn.sqhk.co/sebutarukaw/ZKhieii/wizujulanomexeda.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/wixanarer/77803031943.pdfIn PDF document text
    • http://murorutikuba.rf.gd/videtegarafomor.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/sikenegilavapez.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_off00011b0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B0E 5128 bytes
SHA-256: 6c9f153373bf1e45e752ca51d80f544445d51ba2f033823abf31eb06ad55bf2a
font_01_sfnt_off00012c6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C6E 11488 bytes
SHA-256: 31cb41349bd74ec958821df0951777948ea402f57433353f8a7bc23bf5320875

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