Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8affde996b5eedd…

MALICIOUS

PDF

86.5 KB Created: 2021-02-18 21:58:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ab3ec69b78f6ad9e92ed31a166c135ad SHA-1: a05c2e94970b8568dcbc5b1dc9d2b1d1dbf2e387 SHA-256: d8affde996b5eeddf3f500c23af182b8b1db055034f96df8993bb2b0655a6078
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document exhibits characteristics of a phishing lure, containing numerous external links designed to direct users to potentially malicious websites. The heuristic 'SE_MFA_LURE' strongly suggests an intent to harvest credentials or abuse multi-factor authentication. While no scripts were explicitly extracted, the presence of many external links and the ML classifier's high confidence indicate a malicious intent to redirect users, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • 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 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://jottigo.ru/123?utm_term=how+to+write+a+book+review+grade+7 PDF link annotation
    • https://cdn.sqhk.co/bupabumo/oZhfheY/fangamer_hollow_knight_dlc.pdfIn PDF document text
    • https://molesomux.weebly.com/uploads/1/3/2/6/132681378/959e647f3e.pdfIn PDF document text
    • http://effektzhizni.ru/746783763321j83w.pdfIn PDF document text
    • https://cdn.sqhk.co/bidekidarub/0opfhgD/tupidu.pdfIn PDF document text
    • https://sofusosixep.weebly.com/uploads/1/3/4/4/134493363/lixaronadere.pdfIn PDF document text
    • http://idealica-italy.site/nioh_sword_of_executionmhj74.pdfIn PDF document text
    • https://fewefemuge.weebly.com/uploads/1/3/4/3/134372507/vimose-bobaje-penaroxipa-karofejexokoxiv.pdfIn PDF document text
    • https://kusafulidofet.weebly.com/uploads/1/3/4/0/134017607/wijimev_tedeval_gedoxitol_lagexa.pdfIn PDF document text
    • http://stassikorskyi.com/photosynthesis_whats_in_a_leaf_pack5c03a.pdfIn PDF document text
    • https://xunowivoratidom.weebly.com/uploads/1/3/1/6/131636824/nowuxajizovukorebu.pdfIn PDF document text
    • https://webemimerur.weebly.com/uploads/1/3/1/3/131380848/pijoxalamikena.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384640/normal_600100eeb002b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/29217062130.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/facebook_er_apk_pro.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/naa_autograph_movie_songs_free.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE875 4864 bytes
SHA-256: c2c521fec0f0c938e7ed88e498d29239173a66ecc1b62f6dfc8ae2217f392414
font_01_sfnt_off0000f928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF928 1792 bytes
SHA-256: a2b551832c776e43e00b8e615a36ab5726813e37b79acb53ac974bec532c497e
font_02_sfnt_off00010202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10202 11616 bytes
SHA-256: 4ae950a8a41f13c069867c67ede1026dd0284e9b1f2d0c8be797374cf81ce329
font_03_sfnt_off00012942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12942 16036 bytes
SHA-256: 52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550
font_04_sfnt_off00013daa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DAA 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e