Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ac630154590e594…

MALICIOUS

PDF

76.7 KB Created: 2021-03-15 01:44:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: c8ea6ea393158f7a1f8d44e654c0df9e SHA-1: fec366a0a55ac38d8c8639e01aa2222b739383e1 SHA-256: 6ac630154590e5942340dcd9f66905b4b3fe180f97af8cc17b98a184c14dde17
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high concentration on disposable hosting, indicating a link farm or phishing lure. ClamAV and ML classifiers flagged this as malicious, specifically as a phishing trojan. The presence of external URIs and the heuristic for a link farm strongly suggest the document's purpose is to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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://lozipotod.ru/wix?keyword=original+ap+test+dates+2020 PDF link annotation
    • http://rerolakareruxom.22web.org/58673631061.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479254/normal_60193688c38e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501810/normal_5fd0f9b905bac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455886/normal_5fd718ec8e4dd.pdfIn PDF document text
    • http://figejewumoposes.getenjoyment.net/castrol_edge_fst_5w40.pdfIn PDF document text
    • http://kaxunatinoti.iblogger.org/cipherlab_rk25_user_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501029/normal_603a8c33c1942.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454300/normal_6004e868580f5.pdfIn PDF document text
    • http://fevinoreniwelik.sportsontheweb.net/sesaxebasisoponesejo.pdfIn PDF document text
    • http://maxobujixeweden.sportsontheweb.net/garmin_dive_watch_mk2_release_date.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/nokiva/dawogijedi.pdfIn PDF document text
    • http://vujesidewu.rf.gd/etcher_for_mac_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2868d4d4-8a42-4182-a34e-a576e57f444a/somarejazon.pdfIn PDF document text
    • http://ruvesigokusi.epizy.com/pekefex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71318a7b-b9ee-4e60-a984-def87285edce/which_dect_phone_is_best.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/arundhati_video_songs_in_tamil_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/8097755576.pdfIn PDF document text
    • http://kuxogazixup.rf.gd/housefull_4_movie_songs_320kbps.pdfIn PDF document text
    • http://tifelirixomekap.epizy.com/44696612034.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63700a65-86ae-4f1a-a91a-09868169f660/how_to_reset_bios_weather_station.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5811e85d-149b-40d3-9855-54d9624a3500/zig_ziglar_sales_books.pdfIn PDF document text
    • http://wenulusevikofa.myartsonline.com/47557144510.pdfIn PDF document text
    • http://zusobudem.epizy.com/admit_sentence_form.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_off0000f05e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05E 5428 bytes
SHA-256: 971b3692d309e06e7ee4cbf4f314b6e78dc9fda039d985cbfe8b11ca7c2d79af
font_01_sfnt_off000102d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D9 9668 bytes
SHA-256: 82d39026c3b8b53871e42989210a52b7b72a122b971ee91f6d16a811c2cddf49

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