Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c74ccbaea9761b3…

MALICIOUS

PDF

71.2 KB Created: 2021-03-03 08:23:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 430975dc0bf2cac9cda8eef396767ad6 SHA-1: 5ccadc8fb74788c22a93ff6699dc11f56083e0fa SHA-256: 4c74ccbaea9761b308d10583cee815b5509ffdd88dc650ea4e03fc3d14d577e9
126 Risk Score

Malware Insights

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

The PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URLs, with one specifically pointing to a resource for 'lean canvas template ppt download', suggesting a social engineering lure. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further support the malicious intent of redirecting users to potentially harmful 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://midufefew.ru/award?keyword=lean+canvas+template+ppt+download PDF link annotation
    • http://worozoxiw.sportsontheweb.net/12325256192.pdfIn PDF document text
    • http://techanomic.com/32440432569gg9ku.pdfIn PDF document text
    • http://porn77.design/colt_ar15_pistol_lower0svwj.pdfIn PDF document text
    • http://ganitigusawev.mygamesonline.org/how_is_dramatic_irony_used_in_romeo_and_juliet_act_3_scene_5.pdfIn PDF document text
    • http://banademebilite.sportsontheweb.net/t.i._-_dead__gone_ft._justin_timberlake_traduo.pdfIn PDF document text
    • http://pubguckazan.com/nisolaxuvefavumozudujozpmick.pdfIn PDF document text
    • http://soxaxunobur.22web.org/wedding_photography_posing_guide.pdfIn PDF document text
    • http://tujijamutibe.sportsontheweb.net/are_amana_dishwashers_good.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://boxijekew.atwebpages.com/gosadotaxetefedinana.pdfIn PDF document text
    • http://zikoliduxa.atwebpages.com/lotr_rangers_reddit.pdfIn PDF document text
    • http://miganuvag.myartsonline.com/are_there_any_recalls_on_the_2012_hyundai_sonata.pdfIn PDF document text
    • http://futakanawus.onlinewebshop.net/bepedowenelulavagorif.pdfIn PDF document text
    • http://kifesafijupesob.onlinewebshop.net/23290550119.pdfIn PDF document text
    • http://godutiliwaganos.rf.gd/75608536241.pdfIn PDF document text
    • http://ratobewiwigu.atwebpages.com/32832060136.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_off0000da23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA23 5216 bytes
SHA-256: 3fbcb5e43b6faeec30a20d092335a84b0acfe21bfbd059ab5d73d0e6fba7edf5
font_01_sfnt_off0000ebea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEA 10588 bytes
SHA-256: 0d085aab78d6fdc033f60bde97651e87d2a98f2f41c471349b154fe1f80cc90a

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