Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa888413efc40652…

MALICIOUS

PDF

82.7 KB Created: 2021-03-28 20:35:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 591230cf6b24d8ae36bf29ad9aeaec52 SHA-1: 23b9c1011f3dd01fef1f2a3b44e4c08dac7aabb2 SHA-256: fa888413efc40652e9564cc66c8577b4d144a442d4c11f1b0acbfd26cc077da4
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan. It contains numerous embedded URLs, including one that appears to be a redirector for search terms, suggesting a phishing or scam attempt. The document body, though heavily corrupted, contains text related to search queries, reinforcing the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xajibur.ru/strik?utm_term=is+hunger+games+appropriate+for+13+year+old PDF link annotation
    • http://golixudib.mypressonline.com/53806350582.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484997/normal_604d61efe5f41.pdfIn PDF document text
    • http://fafuzum.sportsontheweb.net/driver_stampante_samsung_scx_3405_per_windows_10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445866/normal_5fd666a97516a.pdfIn PDF document text
    • https://cdn.sqhk.co/xumirikebixo/jcagehi/cat_simulator_free_download.pdfIn PDF document text
    • http://bet-info.ru/12_steps_and_12_traditions_of_aaxtwbn.pdfIn PDF document text
    • https://cdn.sqhk.co/woselukafo/yV5heik/8941035202.pdfIn PDF document text
    • http://tusiteguluvora.getenjoyment.net/make_me_lee_child.pdfIn PDF document text
    • http://tikanaw.mypressonline.com/carbono_14.pdfIn PDF document text
    • http://zugasanuko.getenjoyment.net/guzanawetobivizip.pdfIn PDF document text
    • https://cdn.sqhk.co/potasuregoz/hhhcnge/modako.pdfIn PDF document text
    • http://pelistens.xyz/what_is_the_main_conflict_of_the_play_antigoneoa57c.pdfIn PDF document text
    • https://cdn.sqhk.co/juzexokogim/jbY0Jo0/piano_man_chords_guitar.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/sifawekujiki/33333177886.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/cognitive_behavioural_therapy_for_insomnia_nz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/341c62fb-3596-44e6-ac7a-efccdacdadc6/how_to_type_beta_symbol_on_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c453e5eb-1224-447f-be57-91b4b5bfebc4/25303731755.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/77949953618.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/feba8233-e3fc-4c9d-a350-d95422378491/fonozu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad755436-ee32-489e-9443-f4cb61487ffa/rinnai_code_12_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d88dc78-2a28-410c-a7f8-90b074d69a02/love_in_the_time_of_cholera_movie_summary.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_off0000f7b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B4 5592 bytes
SHA-256: 20419910ae11499127bc5991ba66ff0fe423d1a657657bdd51c68c8e0db96c97
font_01_sfnt_off00010a90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A90 11008 bytes
SHA-256: b42f15f57ee9497f4441b0f1b7d739f567b3bf645ad6f771a0fa214ac2675caf
font_02_sfnt_off00012fff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FFF 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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