Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab0d54add9a799ae…

MALICIOUS

PDF

83.4 KB Created: 2021-03-25 05:10:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 55c20682081187e8b7b7cb62144a2bc3 SHA-1: 54e6d9918ab72ae2f1902baf10b31beb5b226701 SHA-256: ab0d54add9a799ae4cf7bc3a6774a7b647a9c39598525b998533ecafe1929b89
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and is described as a link farm on disposable hosting, suggesting it's used to redirect users to potentially harmful sites. The PDF structure and embedded URIs point towards a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jumiwimov.ru/award?keyword=affiliation+motivation+pdf PDF link annotation
    • http://rukozhop-guide.com/canon_dc_comics_meaning66bas.pdfIn PDF document text
    • https://gojudewusidaza.weebly.com/uploads/1/3/4/8/134888042/gupofe.pdfIn PDF document text
    • http://wei-nmvc.com/47285644881m2hu4.pdfIn PDF document text
    • http://edevletorg.com/51218864960dgku0.pdfIn PDF document text
    • http://zonojebiridizo.mywebcommunity.org/muvobemojexarakokiki.pdfIn PDF document text
    • http://electriccannoz.club/weber_spirit_e-210_flavorizer_barsu28yx.pdfIn PDF document text
    • http://inostrana.com/what_does_it_mean_application_in_review8oc15.pdfIn PDF document text
    • http://questotzvezd.space/bikugufodiwerusopidpqw1z.pdfIn PDF document text
    • http://strahuemsya.info/hangman_game_words_easyem1kv.pdfIn PDF document text
    • https://kitopelok.weebly.com/uploads/1/3/4/3/134355781/mijadamodu.pdfIn PDF document text
    • http://filmera.ru/6918336355l1dbq.pdfIn PDF document text
    • http://heleogose.online/acm_icpc_regionals_india_questionstvyta.pdfIn PDF document text
    • http://b4shop.icu/45274493063z1bl9.pdfIn PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/medaferafasexam-wepunedapakaxo-lojamad-verutesab.pdfIn PDF document text
    • https://rupodekopo.weebly.com/uploads/1/3/4/6/134642208/3391928.pdfIn PDF document text
    • http://ig-support-service.com/modern_warfare_2_maps_wikikx2oe.pdfIn PDF document text
    • http://tarezirok.mypressonline.com/sowij.pdfIn PDF document text
    • http://mamefumiwuto.mywebcommunity.org/materiales_aislantes_y_conductores.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/patilawasu/root_chakra_meditation.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/xufazopoxoreruvokubokom.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/english_grammar_worksheet_for_class_2_cbse.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/what_is_long_run_economics.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/99416085655.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_off00010a35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A35 4960 bytes
SHA-256: 6d1b55ca8e5e44e901ca416f5557fbe5fd280592649b77bb5ff82f7d4b7ad939
font_01_sfnt_off00011b15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B15 10768 bytes
SHA-256: 3575dad3f29f9d4c5dfe3fbc2e63c1b2d4ea58bc48bf7592affb7b606b525342

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