Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a7c9f34a09dc1dc…

MALICIOUS

PDF

89.5 KB Created: 2021-03-19 19:01:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: ae7754d4c4857b94c611dbc6e29e8054 SHA-1: b2d6037f345ebd1f4a49704903e02677a0859df9 SHA-256: 0a7c9f34a09dc1dcfa3ddc95b2d95f0f1696caa4ccec81125c3d1f479e8a172d
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as a phishing trojan. It contains a large number of external links, suggesting it functions as a link farm to drive traffic to potentially malicious websites. The document body is heavily obfuscated, but the presence of URLs like 'https://seumenha.ru/wix?keyword=watch+logan+online+free+reddit' indicates a lure for online content, likely to disguise the malicious intent of redirecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://seumenha.ru/wix?keyword=watch+logan+online+free+reddit PDF link annotation
    • http://verification-help.business/weezer_i_am_the_greatest_man_that_ever_lived_lyricsy79j5.pdfIn PDF document text
    • https://wovofonunubani.weebly.com/uploads/1/3/1/4/131408017/wupepibez-jazejavisedaf-xavamenuwi.pdfIn PDF document text
    • http://habercigo.com/janegixamowawixubo3rcug.pdfIn PDF document text
    • https://xufodikufidu.weebly.com/uploads/1/3/5/3/135382923/2971480.pdfIn PDF document text
    • http://sacredname.ru/brave_horse_trainerbw6zr.pdfIn PDF document text
    • http://1xbet-regi.site/what_to_eat_night_before_running_a_half_marathon4teov.pdfIn PDF document text
    • http://jobauthor.online/denon_avr_1312_manuale_italianomt4jc.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/feliso/any_video_er_site.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04116b8a-f8fb-4bcd-b4fe-6d53ecc09a05/mosujarotusasoviwamu.pdfIn PDF document text
    • https://044e8d80-c429-4a1f-820d-9b443c65b389.filesusr.com/ugd/53c654_91d11076506a4bf8a3ad580c353feb05.pdf?index=trueIn PDF document text
    • https://0dc5fd1c-b354-4e5b-9ccd-45395e8994ed.filesusr.com/ugd/f79e8d_7087f059daa2479b969475096204b218.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cba27daf-4330-4b75-8f6f-49c39d64b3fc/how_to_connect_canon_pixma_g3411_printer_to_wifi.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/assam_full_map.pdfIn PDF document text
    • https://b8436764-02b3-4471-8711-1e8fed235cf0.filesusr.com/ugd/3b3fbb_777ac9ed23e24783aa8cde03de13f82a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/154b4200-10bc-4ab3-8418-0f17b5ba3343/latest_news_about_lockdown_in_india_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/chromecast_audio_windows_10.pdfIn PDF document text
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_0ffec5885cd14f7e9c38b6a874312fbd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/da328d55-023c-4896-b2e8-6e3bc9837957/86231958390.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/69290675740.pdfIn PDF document text
    • https://8ab1a2d5-e5b1-44c5-a28c-e09959565f0d.filesusr.com/ugd/eb712c_fae93ab544714722bc7b59a4b5ede7f2.pdf?index=trueIn PDF document text
    • https://91c7bc9f-df77-4dbd-ae51-8bcf521f3e61.filesusr.com/ugd/1df9ea_b2f6c3c9ef5746f88e3bcce16128ded5.pdf?index=trueIn PDF document text
    • https://856cb5e6-6c81-45ce-9604-b57907a15cd2.filesusr.com/ugd/cc3ca9_2c86fa5ae8124fd9882484912fdc58e2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/018468e4-8451-47a6-abc6-99b22f1c67ae/how_do_you_turn_on_a_vitamix_blender.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_off00012069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12069 5120 bytes
SHA-256: f1fa018a56eeb29f80b7409af26d9c766d4c9611f000b8bcd5b100a1270a04cd
font_01_sfnt_off000131dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131DC 11428 bytes
SHA-256: 5210e4002e35a58dcf88a5d949f2b6722595e2b88b76803bb872a1474b3e81e4

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