Malicious PDF — malware analysis report

Static analysis result for SHA-256 29dc218f5d86f9bd…

MALICIOUS

PDF

75.8 KB Created: 2021-04-04 19:41:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 0cfb54643d476a8f611c1600b3d270f8 SHA-1: b835e4387fa527f2af9a0d51f0e91f87188bba10 SHA-256: 29dc218f5d86f9bd9afa4546e3893bb9253c67f5ad32b48c4d1c39a39ee96d13
204 Risk Score

Malware Insights

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

This PDF is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains numerous external links, including one pointing to a redirector URL, suggesting an attempt to trick users into downloading further malicious content. The presence of a 'download button' heuristic further supports this phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nipisod.ru/award?keyword=bangladesh+map+pdf+file+download PDF link annotation
    • https://cdn.sqhk.co/xewazezikufi/jaheFjj/adobe_acrobat_x_std.pdfIn PDF document text
    • https://xabejelowubi.weebly.com/uploads/1/3/2/6/132695530/9716469.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/kjjZbOx/wbtv_charlotte_live.pdfIn PDF document text
    • https://cdn.sqhk.co/bedepekemat/KqSLsjb/90870752219.pdfIn PDF document text
    • https://jukudedavat.weebly.com/uploads/1/3/0/9/130969580/4667170.pdfIn PDF document text
    • https://vavaterojitenoj.weebly.com/uploads/1/3/4/8/134898986/1592959.pdfIn PDF document text
    • https://cdn.sqhk.co/zezinojox/fjj8idJ/low_fare_flight_calendar_southwest.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tosevud/does_whirlpool_still_make_duet_washer.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/miss_peregrines_novels_in_order.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/poxebulitawaninodisetut.pdfIn PDF document text
    • https://cd29ef07-728f-4a0b-b57b-23e770395c36.filesusr.com/ugd/f14cf6_fb3f5b0c86ca4393a0b1a2d1a62f87d9.pdf?index=trueIn PDF document text
    • https://f64a1a0a-debf-4843-a838-a34c0cae0f4a.filesusr.com/ugd/89602e_4b88610fc0b147209507db7d605a7832.pdf?index=trueIn PDF document text
    • http://sasomibaben.rf.gd/realistic_pencil_drawings.pdfIn PDF document text
    • https://9387bd13-3746-4408-b474-2867f26e464d.filesusr.com/ugd/ace02d_9bd70a020b3748abb8e18ebfa307fbb1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/congenital_heart_disease_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/anker_a7726_bluetooth_keyboard_pin.pdfIn PDF document text
    • https://0c241ebc-151b-48bf-a4db-a9f2ee65d67b.filesusr.com/ugd/c17081_ec10603782b64df29475acdb44092c33.pdf?index=trueIn PDF document text
    • https://91953a53-6f32-4f2a-9b2e-0f954541ff31.filesusr.com/ugd/dad90e_816e2e6d0ab8438ab3fb18334e77da54.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/73771960662.pdfIn PDF document text
    • http://godutugogusapa.rf.gd/lixuwavabepugal.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e70e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE70E 5500 bytes
SHA-256: c53978bb19d8a01e4be0500267f12f63bc9e151dab821058cd969493a4132eec
font_01_sfnt_off0000f9b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B6 12360 bytes
SHA-256: 7f6a0756d5ab8a43809d31d321d7c45ac2405bc4783060bcd2520852103aae37