Malicious PDF — malware analysis report

Static analysis result for SHA-256 22b79b7bce74575f…

MALICIOUS

PDF

79.0 KB Created: 2021-04-16 05:28:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee50d654c58d22cb09b38c5b03bf92a1 SHA-1: 2cd932eec59c96d4ba13799004f6e8ecf1104e5c SHA-256: 22b79b7bce74575f7c68533cb9cb63dbf64098100231bcfbe0b0548da9041cfb
246 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.001 User Execution: Malicious Link

This PDF document exhibits characteristics of a phishing lure, indicated by the presence of numerous external links, some pointing to potentially malicious domains. The ML classifier and ClamAV detection strongly suggest malicious intent. The document's content, though partially obfuscated, appears to be a lure related to camera resets, potentially aiming to trick users into clicking malicious links or providing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 8

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://ponafet.ru/strik?utm_term=q+see+camera+reset
    • http://picsonair.com/gupigowogpgxsc.pdf
    • http://thecabinets.xyz/descargar_el_camino_del_artista_julia_cameront2bon.pdf
    • http://drive4mclaneaustell.com/history_of_christianity98p0u.pdf
    • http://hotsales-com.xyz/92834600501tvsi6.pdf
    • http://compte-cmbretagne.best/xeruduzuvewulexnqhi.pdf
    • http://normab-id.com/how_to_program_a_craftsman_universal_garage_door_openersb1uh.pdf
    • http://svoydvalend.xyz/fajinovopilaradetr73se.pdf
    • http://balifruit.com/kakobolopcx6t8.pdf
    • http://foyou.store/how_to_pair_pioneer_mixtraxl8h9k.pdf
    • http://starkrobotics.org/wood_carving_merit_badge_worksheet50m8s.pdf
    • https://pirizujimo.weebly.com/uploads/1/3/4/4/134454944/gerimuwojute_vilip_savusi.pdf
    • https://gugibutuxu.weebly.com/uploads/1/3/2/8/132814167/bewulekebewejorejuke.pdf
    • http://circulshtangcalip.website/vivojixoxekozibimipuxe1eo.pdf
    • http://show-visitor.xyz/70224051637wvz8l.pdf
    • http://girlsbeach.space/75400650800gu4l7.pdf
    • http://uggi-ugg.com/white_christmas_song_original_lyrics9wvr7.pdf
    • http://youtube-subscribes.com/pipopozetei502.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://3778afa4-e5d9-4bb6-be54-d343c89b577b.filesusr.com/ugd/11c894_eff43550efb94aec8958784cd92eb09a.pdf?index=true
    • https://fd7a53fe-11c1-4e60-83ad-ac1bb997268f.filesusr.com/ugd/5cf23b_02db9c083dab4c3695c37c044ec3cda1.pdf?index=true
    • https://a52dd608-e7dd-4d50-8005-e0fd7a3896b4.filesusr.com/ugd/43d2fc_fa7d876bdc1a4f488c9acd8a6f1f4b31.pdf?index=true
    • https://69b3109a-7cce-4514-9193-d2106d9976ab.filesusr.com/ugd/3c2969_93eadbdcc0ee40de8b49023f948b6bd0.pdf?index=true
    • https://933e9900-fbdf-42a6-9ede-b5fb8444937c.filesusr.com/ugd/3254bf_5dd6498b2399456faa81768dc47e92a5.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f686.bin
8e78e1bf9df411d970c52431edc627a9be7a69687cd11a171763c068a3a16ba6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF686 4972 bytes
font_01_sfnt_off0001075a.bin
806a80d02df2703974523cabac2a8028bce2e4f85d0bd84c95e82dd97a9a953e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1075A 11112 bytes

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