Malicious PDF — malware analysis report

Static analysis result for SHA-256 610ac9957417371c…

MALICIOUS

PDF

80.0 KB Created: 2021-03-28 13:49:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: e2622475950af94392688584c9ca0d42 SHA-1: c160d1e463fd0477dbfd5f91eae559bf9c07cbb0 SHA-256: 610ac9957417371c941a2eda7a4b63da107111eb51108521be5099ffec7e2b23
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and identified as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were directly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/wix?keyword=native+american+mens+jewelry PDF link annotation
    • http://milanbeachs.space/nipepusobekozoribikekeojnwe.pdfIn PDF document text
    • http://gufutaca5.xyz/summary_of_the_poem_fire_and_ice_brainlyrsdz9.pdfIn PDF document text
    • http://lynciguest.com/beyblade_v_force_episode_guiden47xi.pdfIn PDF document text
    • https://tawixepew.weebly.com/uploads/1/3/0/7/130739069/8575347.pdfIn PDF document text
    • http://karaulovlife.site/casio_vibration_alarm_watch_pricegkh4b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372963/normal_5fe0d5e296478.pdfIn PDF document text
    • https://xupazipul.weebly.com/uploads/1/3/5/3/135325103/9104143.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486521/normal_60181c3d4f737.pdfIn PDF document text
    • http://namedaun.fun/forex_trading_strategies_free_downloadyig7z.pdfIn PDF document text
    • http://hq-cleartv.info/surah_yaseen_english_and_arabicvk818.pdfIn PDF document text
    • http://setlyb.online/is_slavery_legal_anywhere_in_the_worldr7ogo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492536/normal_603f843bc67b3.pdfIn PDF document text
    • http://telgrm.site/romper_pattern_plus_sizefg8z0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386836/normal_6049383f78280.pdfIn PDF document text
    • http://bitjoms.xyz/golden_song_lyricsy4212.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://58f604bd-1fd8-4cfe-af9b-f15e67d030d5.filesusr.com/ugd/9a7439_031ee81ef9964e3e995aa82f2ecaec65.pdf?index=trueIn PDF document text
    • https://63b1f34b-4847-450f-8d9a-4788d10e1cf5.filesusr.com/ugd/451a43_802e50a5bf4e4ed4b4e02a5b1eefd55d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/96efcae8-c448-4f81-a190-626dce152d4d/zimesujofoganul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78f10240-9254-4387-bd35-7ca84b4fefdf/41308841353.pdfIn PDF document text
    • https://17851959-1482-4b49-8222-7b7b0c628459.filesusr.com/ugd/3cb679_bd29878c39b1434b85d1070bfb0abb79.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1057f099-cf74-4bce-9031-cfbd96f713af/71180374235.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_off0000fb88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB88 5244 bytes
SHA-256: da8b6b9b76adcd875ed23ee9502c1eaca3fdfac2d84e270b8d7bf9d61f357207
font_01_sfnt_off00010d6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D6C 11004 bytes
SHA-256: 7f0137251add52e6f835ba6180268d8e06f5cf42c233c9a768bca07a802159b6

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