Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eb0f34d90473a2e…

MALICIOUS

PDF

78.7 KB Created: 2021-05-10 14:54:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 243e9af704f8a325f3e393ce4f1c2a9d SHA-1: 38a1b9b0585a73f3dc0887345b99f352eb08ddcc SHA-256: 5eb0f34d90473a2e87b2d9fd248e914106009153dce086a986ba86e2b3be6f0d
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The PDF's structure and embedded content suggest it is designed to exploit user curiosity or trust through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://vilenefex.ru/strik?utm_term=vicks+vapor+inhaler+cvs
    • https://static.s123-cdn-static.com/uploads/4491933/normal_6008db3c46c41.pdf
    • https://static.s123-cdn-static.com/uploads/4530036/normal_5ff5fac436bc2.pdf
    • https://cdn-cms.f-static.net/uploads/4378845/normal_60648a355ca86.pdf
    • https://cdn-cms.f-static.net/uploads/4476007/normal_60157e01b8653.pdf
    • https://cdn-cms.f-static.net/uploads/4458421/normal_606df8650ff7e.pdf
    • http://katermore.ru/mokerirefavosinqchbu.pdf
    • https://static.s123-cdn-static.com/uploads/4404293/normal_5ffcd3c6b7db2.pdf
    • https://cdn-cms.f-static.net/uploads/4391302/normal_603a590817349.pdf
    • http://iglivesupportteam.com/pidunufuzuxemotejefutiwift0cmv.pdf
    • http://instgrmmverifiedbadge.com/descriptive_adjectives_worksheet_grade_11r3g2.pdf
    • https://cdn-cms.f-static.net/uploads/4482189/normal_5fe9f725837fd.pdf
    • http://biomanua.website/dell_755_tower_specificationso7seb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/roware/cyclone_punjabi_song_free.pdf
    • https://s3.amazonaws.com/nuxulikiwab/64427869884.pdf
    • https://s3.amazonaws.com/ginutu/11274106995.pdf
    • https://uploads.strikinglycdn.com/files/5d14a597-97b1-4110-b7bb-4f91a3c17ba6/71179843367.pdf
    • https://s3.amazonaws.com/diwitapezu/going_back_west_ringtone_free.pdf
    • https://uploads.strikinglycdn.com/files/099ed9a4-7692-4192-8a73-d020936c046f/lefuw.pdf
    • https://e192e36c-395d-4660-9df6-aa7aed00c30a.filesusr.com/ugd/3aee12_0794c78accbe4b0ca660d7768f535c36.pdf?index=true
    • https://uploads.strikinglycdn.com/files/66f849ca-c4be-454a-ae93-05209b0a83d0/colored_pencil_techniques_flowers.pdf
    • https://8fc1c2d6-49ba-4d63-8b95-0327ef2b1627.filesusr.com/ugd/1849a1_e8786476005a4fcbbae9b60a4f6b871d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/03118bbc-6331-4901-b2e9-f0e8aed5752b/graco_duoglider_rascal_target.pdf
    • https://e809654a-a95b-4dbc-a338-24085255a2f8.filesusr.com/ugd/1b6cec_9762c1020eaf42c3baa95dd164ce527f.pdf?index=true
    • https://1d942ef5-affb-47d8-8f99-70a3d187b733.filesusr.com/ugd/3283b0_5a3d9018c7c649feb84429f51ebe7806.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0baffa42-9318-4da5-b8fc-24bf6b399033/how_to_take_alarm_off_casio_watch.pdf
    • 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_off0000f2d6.bin
97fafe2fd1dd38cd96aa5b1f5279655ab0e2b48c7e610fd0b91444e0da3e2865		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D6 5108 bytes
font_01_sfnt_off0001043d.bin
89465a5980961298af674fa9beb488549b9ac90feb5f879059a85430bef22c27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1043D 12280 bytes

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