Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3f5d9e7e6ce7404…

MALICIOUS

PDF

73.9 KB Created: 2021-03-01 02:45:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5d183a9e1b3a25b95c273167d01c881e SHA-1: 921ef5fd2db6bb9e27de686d2295c903d81631a7 SHA-256: d3f5d9e7e6ce74041f217044b8ba039351f0f4708d638e4ee5237f606ef1ee03
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/aws?utm_term=the+complete+tales+of+winnie+the+pooh+epub PDF link annotation
    • http://bas-vorota.ru/brasfoot_2020_patch_portugaluzt84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477147/normal_5fd665cf0fb14.pdfIn PDF document text
    • http://abzac.me/15616555876euw4e.pdfIn PDF document text
    • https://cdn.sqhk.co/rabuvimi/jhcijhg/drift_classic_2_mod_apk.pdfIn PDF document text
    • http://kulinarny.site/753023493730amt6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408170/normal_602772fab1c36.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/iaWhfgi/clash_royale_decks_arena_12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454435/normal_601ae3fd2dfb2.pdfIn PDF document text
    • http://allrecipes.pro/my_first_1000_words_english_spanishh1t9g.pdfIn PDF document text
    • https://cdn.sqhk.co/jubawiwa/hcjgQje/4600863886.pdfIn PDF document text
    • http://findssldz.xyz/rockstar_movie_720p_bolly4uvg6sx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465690/normal_5fcceefdc246e.pdfIn PDF document text
    • http://tramlaweq.online/pinatijelrd.pdfIn PDF document text
    • http://topcreditmonitoring.info/easy_piano_music_sheets_popular_songs8w1a1.pdfIn PDF document text
    • http://pasasem.iblogger.org/xunama.pdfIn PDF document text
    • https://juladuwupib.weebly.com/uploads/1/3/4/7/134763366/novenomadirupav-kevulemi-gonamopan.pdfIn PDF document text
    • https://zikotidule.weebly.com/uploads/1/3/4/6/134604350/526fecd393.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
    • http://gixagezupupif.rf.gd/what_is_a_server_for_dummies.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC92 5220 bytes
SHA-256: 7b670d2eae92e8ecf6c2e3d52d455e0a2884e2eb954b14676767037f313aa5a5
font_01_sfnt_off0000de3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3C 13648 bytes
SHA-256: cc958a560c1f160ef42fac20ad62c99a3a6235f1b083eab33b2970472cb74528
font_02_sfnt_off000109b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B7 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

Open this report in the interactive analyzer, or submit your own file for analysis.