Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f7172e2705d39b2…

MALICIOUS

PDF

69.5 KB Created: 2021-04-08 03:22:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4fda7b26fd89141ea3ab60c468192ca SHA-1: 83bc1140a341ab5d7bcdba671c23c5c0d1859c8d SHA-256: 8f7172e2705d39b27528df43a1fb1ebe8b1ed489479cd32830df019c3fc27d77
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or SEO spamming operation. ClamAV detected this file as 'Pdf.Phishing.Trojan', and a critical heuristic identified it as a PDF with a mass external link farm. The embedded URLs suggest an attempt to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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
  • 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://xezojetit.ru/wix?keyword=auto+like+apkpure
    • https://cdn.sqhk.co/zivupowixede/ghicjdL/neon_running_shoes.pdf
    • https://tiseworadew.weebly.com/uploads/1/3/5/3/135317060/7082360.pdf
    • http://smotrikino.fun/xovopiwikimew5dn0d.pdf
    • https://noderewowiful.weebly.com/uploads/1/3/4/5/134596184/fekose.pdf
    • https://cdn.sqhk.co/fiwojosop/2S2Isih/asian_jurassic_park.pdf
    • http://krokoboko6.xyz/nikon_d40_dslr_camera_with_18-55mm_lenskss0f.pdf
    • https://wezalowesugalu.weebly.com/uploads/1/3/2/8/132815960/ceb1c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/feborobegibew/how_to_read_couch_dimensions.pdf
    • https://a0f88182-e1f9-4a9c-ba22-d5ce004c6985.filesusr.com/ugd/2f3216_d665a751a23b4ef8b79f4d311dde9f55.pdf?index=true
    • https://s3.amazonaws.com/sedowedi/pokakemupopufokemem.pdf
    • https://c8a164a7-2549-4056-b209-d27d417f800b.filesusr.com/ugd/136d3d_1aed5243fdef46dda080c24e0a19ae9e.pdf?index=true
    • https://5b949be5-44ef-49af-96c7-0ebaa8fe632e.filesusr.com/ugd/3402b1_640d0ab646844a0487ac869e5c163b77.pdf?index=true
    • https://9305c775-266c-4126-9ef9-90a5cffee957.filesusr.com/ugd/c3f88d_b85ae0034dbf4337bb2ea2aa8c6f3821.pdf?index=true
    • https://22520ec4-2132-45a5-98b8-54db1b71d3ea.filesusr.com/ugd/b33b96_2b34e3061ae649a29123890f1033e12e.pdf?index=true
    • https://s3.amazonaws.com/temujonuwu/how_to_pair_xfinity_remote_with_roku_tv.pdf
    • https://d7d9470a-9784-4c28-ac68-b1ab0f70ddf3.filesusr.com/ugd/148484_f1df79591687443b81534e1dcdda274b.pdf?index=true
    • https://1eba3b37-3dce-45e8-aa15-e51a58efc0fe.filesusr.com/ugd/89e37c_655d97166c4c4a74bb70968c23fcbb0e.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_off0000d52a.bin
746d7504ffe99a42853154bb1a48a85c98f4a6b0931d636767b086824d6be5fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD52A 4688 bytes
font_01_sfnt_off0000e52a.bin
27e1c45920f28405de0af3b01ce53db7754b1a027a4f6b272fc19865935b33e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE52A 10420 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.