PDF malware analysis — malicious · 48be0e2e49b2d57c

MALICIOUS

PDF

81.0 KB Created: 2021-09-14 18:05:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: bcbf79af77e9caaea028ade968f390be SHA-1: f3d3f8eafb39dda5addea1de49a8047008a85b72 SHA-256: 48be0e2e49b2d57c1dc5094d7ecb13a258cdb64b4c7528716289d961c6eb5da5

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, and contains numerous embedded URLs pointing to potentially malicious domains. The heuristic 'SE_URGENCY_LURE' suggests a phishing pretext, aiming to trick the user into clicking one of the many external links. No scripts were extracted, but the PDF structure and embedded links are indicative of a phishing campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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://pixomot.ru/uplcv?utm_term=photo+room+android PDF link annotation
- https://ice-group.pl/userfiles/file/zumekotuxuxurebarezug.pdfIn PDF document text
- http://brbud.pl/userfiles/file/24887503030.pdfIn PDF document text
- https://pima-alarms.rs/slicice/file/nelonojexunag.pdfIn PDF document text
- http://ei-windykacja.pl/upload/file/61104754877.pdfIn PDF document text
- http://hzdsbg.com/uploadfile/1631089491.pdfIn PDF document text
- http://osoboebludo.com/ckfinder/userfiles/files/rokemozizoku.pdfIn PDF document text
- http://yacpa.org/yacpafiles/file/77883232181.pdfIn PDF document text
- http://sunriverps.com/data/editor/file/61873114689.pdfIn PDF document text
- http://www.yt333.com/userfiles/20210910/file/1631284229.pdfIn PDF document text
- http://starinviter.com/ckimagefiles/48361745606.pdfIn PDF document text
- https://bengalroys.com/ckfinder/userfiles/files/dogafinajefixeda.pdfIn PDF document text
- https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/4d2472ca4c62924e7af629857d88f4e7/76683648915.pdfIn PDF document text
- http://emannsltd.com/userfiles/satezumawixuzaxukav.pdfIn PDF document text
- http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613db3a823d14---75863072322.pdfIn PDF document text
- http://songdolandmarkcity.com/userfiles/file/25557822755.pdfIn PDF document text
- http://tsyrulnikov.ru/upload/file/81807049309.pdfIn PDF document text
- https://www.privathospitaletkollund.com/ckfinder/userfiles/files/kekorusunukamikuzog.pdfIn PDF document text
- http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/34217720154.pdfIn PDF document text
- http://nuovojob.com/userfiles/files/zusomopivob.pdfIn PDF document text
- https://groupburuemas1.com/contents/files/xupiparelalunevujojijuju.pdfIn PDF document text
- http://lynxitservices.com/ckfinder/userfiles/files/dabegezejulera.pdfIn PDF document text
- http://pwmtqatar.net/userfiles/file/vixofitomerixurokerifa.pdfIn PDF document text
- https://riminabda.sk/userfiles/file/ramedasig.pdfIn PDF document text
- http://glampingcaravan.com/userfiles/file/20210909205037.pdfIn PDF document text
- https://cytokin.ca/upload/editor/file/90882912178.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://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d948.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD948	10168 bytes
SHA-256: `5ae0de8c6b22479de50024695956720c344e66b41a07cf7eaea9a17047d8a4b5`
`font_01_sfnt_off0000efcc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFCC	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000107de.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x107DE	17816 bytes
SHA-256: `d8086e7f20d1aad65f834be4d4e933a7f8e0a8e6c98446c2eda48f8a002bf470`

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