Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccff6ad538fb1615…

MALICIOUS

PDF

129.1 KB Created: 2021-03-31 06:05:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3264f422a0de48598b6fbab2fc2f421 SHA-1: 25444b4b96223580800caf87724fb4941469db0b SHA-256: ccff6ad538fb161509c4b7d33ad05a911abc763780c76620690a2d3a05333dc2
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm. The primary URL points to a domain that appears to be part of this farm, suggesting a malicious intent to redirect users. While no scripts were explicitly extracted, the PDF structure and the heuristic firings indicate a malicious phishing or content distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9811

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://ponafet.ru/wix?keyword=desperate+times+call+for+desperate+measures+origin
    • http://jalopava.22web.org/animal_kingdom_imdb_parents_guide.pdf
    • https://cdn.sqhk.co/benibavagoge/gihjYjd/find_skype_users_online_chat.pdf
    • http://rokamawu.iblogger.org/nojewatitazonitetewugusas.pdf
    • https://cdn.sqhk.co/xaselavub/Chaihgi/occupational_health_definition_ppt.pdf
    • https://cdn.sqhk.co/xororofomed/cegiijy/freaky_tiktok_sounds.pdf
    • https://cdn.sqhk.co/wobuwozavenu/hhiehj3/38657703301.pdf
    • https://cdn.sqhk.co/tomubozes/iihgiid/rank_of_a_matrix_row.pdf
    • https://cdn.sqhk.co/lopijikuvi/gi3tvjf/animal_boyfriend_confession.pdf
    • https://cdn.sqhk.co/fagiseregu/mThhjer/tizenafiviguxebelabakuj.pdf
    • http://www.opentle.org
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://www.daltonmaag.com/
    • https://4b523d79-2bc6-404f-8e52-0acae4d2cb03.filesusr.com/ugd/fe1b41_a12e42d980e74d119265ba637966b152.pdf?index=true
    • https://35057dd6-1d18-4acd-96c9-af3b7fddc7cd.filesusr.com/ugd/978dd5_704e8eff81e444e4851cf32dac0c31a2.pdf?index=true
    • http://togalufunepobaz.rf.gd/33558235896.pdf
    • https://ba10d46a-d7c1-43af-8542-f1a50f31aa8a.filesusr.com/ugd/4dded2_6e0092b9e4a947458e45075fc7011301.pdf?index=true
    • https://4590046d-f0a9-4171-b8a0-56ff8c1fe63c.filesusr.com/ugd/0bfb20_a6add63903e84b54b74d4faafef38d0d.pdf?index=true
    • http://ruxatavebokoj.epizy.com/20963922210.pdf
    • http://gusukeru.rf.gd/gta_chinatown_wars_android_free.pdf
    • https://36535336-4f9e-4c0a-b1ad-3385cb5d4299.filesusr.com/ugd/15ebe2_fdcc416390b847a28e8e82bbb8d1c591.pdf?index=true
    • https://858e1da1-ad31-4e5b-aec0-89c59c6c71f6.filesusr.com/ugd/6240f8_c3240a0fb26544e49ab10304c8dc53df.pdf?index=true
    • http://jajoxutevo.epizy.com/mufibosogomudigawitixatol.pdf
    • https://76b44699-1094-4fd8-8d4a-70b7be8159c3.filesusr.com/ugd/c450b2_c6d37e0323d742b499dbe1e288adf6d2.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://www.gnu.org/licenses/gpl.html
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 10

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off00015caa.bin
01d43f0648408614ff29f42a68fc136223a403b537f2100e476235687fd00cd7
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x15CAA 9956 bytes
stream_009_off0001b2fb.bin
5fc287ba6617fb03f4c180aae21cba63a7a8b3ffaa58f970a7e5a4ea17828553
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1B2FB 21928 bytes
font_00_sfnt_off0000f047.bin
8c2993e3fd93ec7c87d6258668aab14a04581ebd169aa2646ce52393c34adaa5
pdf-font-stream PDF embedded font (sfnt) at offset 0xF047 11428 bytes
font_01_sfnt_off000115b7.bin
beb2e4a97d605a0455981e7a9e5f1726714b5146c44df26d3d73fadd1379bbc0
pdf-font-stream PDF embedded font (sfnt) at offset 0x115B7 5356 bytes
font_02_sfnt_off000127d0.bin
632957042b140b70fbf8a8d18db7434fdce3c90878c889d01312fe5c4356aa21
pdf-font-stream PDF embedded font (sfnt) at offset 0x127D0 7504 bytes
font_03_sfnt_off00013dff.bin
6d897259d7ab9db79b0dbb16904cd99ff486aa7f4a475590a5d3e44eab6e0eed
pdf-font-stream PDF embedded font (sfnt) at offset 0x13DFF 2328 bytes
font_04_sfnt_off000148b5.bin
dc2bfc325cd311f9b7189cf15da3eebfbf11a9682b0ce0b4a786c2a9fac227e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x148B5 6216 bytes
font_06_sfnt_off000178ee.bin
77834e50913f37c5d69981fb35b78acaabb4b9f9a315a5988cb4d26df32f7af4
pdf-font-stream PDF embedded font (sfnt) at offset 0x178EE 20440 bytes
font_08_sfnt_off0001d856.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x1D856 4324 bytes
font_09_sfnt_off0001e657.bin
333cf0bae5291019b79d77a37696b89786718dc77a0e6f1c7356514a48765311
pdf-font-stream PDF embedded font (sfnt) at offset 0x1E657 3276 bytes