Malicious PDF — malware analysis report

Static analysis result for SHA-256 77aeed230118943b…

MALICIOUS

PDF

76.2 KB Created: 2021-06-07 19:36:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 70038a56d111556ed2ccd050f132156d SHA-1: f21c697ffbdc73eb9e9f0b0f70ebcc185887a978 SHA-256: 77aeed230118943ba859a689a31978648637d00cedf2c0c3238e0df5060f3017
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8327

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 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
  • 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://infrive.ru/pbw?utm_term=neewer+nw-700+driver PDF link annotation
    • https://xumiwuwazugeri.weebly.com/uploads/1/3/4/4/134444831/8141021.pdfIn PDF document text
    • https://mumanewuneju.weebly.com/uploads/1/3/2/7/132712109/rezonafamupora_releroze_fanop_bitiba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382953/normal_601d2f51ef26d.pdfIn PDF document text
    • https://pogerukafitili.weebly.com/uploads/1/3/1/4/131437037/55888a49e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470228/normal_5fe37c04b7850.pdfIn PDF document text
    • https://kasewipiliri.weebly.com/uploads/1/3/4/9/134901701/3615969.pdfIn PDF document text
    • https://vatewiwep.weebly.com/uploads/1/3/4/4/134482367/telizumemamamolebo.pdfIn PDF document text
    • https://zubikazosiz.weebly.com/uploads/1/3/4/7/134761183/forosifamibatupixa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379221/normal_600be322c8b58.pdfIn PDF document text
    • https://kekewunurezof.weebly.com/uploads/1/3/7/5/137507426/tukotagibub.pdfIn PDF document text
    • https://nagejezesalu.weebly.com/uploads/1/3/0/8/130874580/zarixifidose.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413696/normal_601ad766a0cd6.pdfIn PDF document text
    • https://jimigafekalese.weebly.com/uploads/1/3/1/4/131407537/90f30e92c5.pdfIn PDF document text
    • https://wuwifure.weebly.com/uploads/1/3/4/6/134647121/dubosevora.pdfIn PDF document text
    • https://xulijuba.weebly.com/uploads/1/3/1/1/131164032/77300bed6dbc8b0.pdfIn PDF document text
    • https://dejokorakas.weebly.com/uploads/1/3/1/3/131379117/runowavodakosizo.pdfIn PDF document text
    • https://jawozararo.weebly.com/uploads/1/3/5/9/135964334/2190435.pdfIn PDF document text
    • https://xuvunigito.weebly.com/uploads/1/3/1/1/131164310/xuxen.pdfIn PDF document text
    • https://povoligijiz.weebly.com/uploads/1/3/4/6/134665243/8341764.pdfIn PDF document text
    • https://ruwofemenir.weebly.com/uploads/1/3/4/0/134040866/palotukofa_vetaboxepegefif_zamom.pdfIn PDF document text
    • https://bivupiduxod.weebly.com/uploads/1/3/4/6/134664268/9221496.pdfIn PDF document text
    • https://bojumojomugo.weebly.com/uploads/1/3/4/8/134850871/lexafoz.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
    • https://uploads.strikinglycdn.com/files/a694f95b-a9cf-4186-9fc4-7b7be15ed340/nufadevajawi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c3359e2-d7e9-4e33-8720-697311001d22/12793735454.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b3a109f-4dab-414c-b69b-60f01725e6b7/5381141325.pdfIn 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_off0000ef02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF02 4372 bytes
SHA-256: e29a01f8442b43690252085304f341fd32857b5367f2884d7adfdf752c0e561b
font_01_sfnt_off0000fdf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF0 12188 bytes
SHA-256: d72c4edac476f941c6ff456142889d276ff75cb79cb4e6984d9e376333be679c
font_02_sfnt_off000126c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126C2 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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