Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebf3c45e725d1c68…

MALICIOUS

PDF

77.7 KB Created: 2021-03-01 06:05:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 44cef893d79b7d125f405fc7db38c4b3 SHA-1: 5e64a81c5836b47483210fd47b6fcf33e51acfb2 SHA-256: ebf3c45e725d1c68322360675f8de2c5bea09f52b37d3e9157ae02b12d16784d
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam campaign. One of the embedded URIs, 'https://midufefew.ru/strik?utm_term=will+ps+gold+headset+work+on+xbox+one', is likely part of a phishing or malicious redirection scheme. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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/strik?utm_term=will+ps+gold+headset+work+on+xbox+one PDF link annotation
    • https://wilemixi.weebly.com/uploads/1/3/0/9/130969959/vilifipunemad_gebekekeva.pdfIn PDF document text
    • https://cdn.sqhk.co/kagawupatow/jiiagf8/bouncing_ball_experiment_conclusion.pdfIn PDF document text
    • https://buxodofuluni.weebly.com/uploads/1/3/4/8/134875319/5334555.pdfIn PDF document text
    • https://kerawidirara.weebly.com/uploads/1/3/4/7/134746453/5dd5bd.pdfIn PDF document text
    • https://tufelovewojamex.weebly.com/uploads/1/3/4/3/134331554/josogasozona.pdfIn PDF document text
    • https://toxovapuwelubu.weebly.com/uploads/1/3/4/7/134733969/3435647.pdfIn PDF document text
    • https://wixefonimav.weebly.com/uploads/1/3/1/4/131437632/wixenabo_gojosuso_sopirenorinu_zepude.pdfIn PDF document text
    • https://cdn.sqhk.co/lolajelor/g9hdiij/84490135637.pdfIn PDF document text
    • https://noxijinijomud.weebly.com/uploads/1/3/4/7/134746703/jolakap.pdfIn PDF document text
    • http://fuvagezilavez.mygamesonline.org/1565209776.pdfIn PDF document text
    • https://ruwixotuso.weebly.com/uploads/1/3/4/1/134131383/82ae82e6769f493.pdfIn PDF document text
    • https://zakonuvuluj.weebly.com/uploads/1/3/5/9/135984705/7953967.pdfIn PDF document text
    • https://cdn.sqhk.co/guzorata/xtiaigw/the_zombies_time_of_the_season_rap_remix.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://kudawugijamino.rf.gd/fantasy_football_cheat_sheet_central_espn.pdfIn PDF document text
    • http://tuzuvas.rf.gd/passport_renewal_form_ds-_82.pdfIn PDF document text
    • http://zilokujidetomo.epizy.com/63042383884.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_off0000e5ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AB 5388 bytes
SHA-256: c884804a0c4d886737c4b51f4d9f6588a59910f8a3f4c18fd765a96ef2aba97f
font_01_sfnt_off0000f7fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FD 10380 bytes
SHA-256: a2ab37bff7d61ecc5620dbb4af19832f8b5b7305c7e35ec8794f65a4ff77fa85
font_02_sfnt_off00011b70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B70 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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