Malicious PDF — malware analysis report

Static analysis result for SHA-256 732822300c0c5599…

MALICIOUS

PDF

77.2 KB Created: 2021-03-27 17:39:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: e8e7a07b9baf9ec2ee4f0bf309c3cc91 SHA-1: bb13eef8aba31ddf033885465af7385970911fb7 SHA-256: 732822300c0c55995b391ffa6af070bf91b5930032839c51161dff1dbc06ade4
96 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 'PDF_SEO_LINK_FARM' heuristic. One of the primary external URIs points to 'https://midufefew.ru/wix?keyword=toomics+mod+apk', suggesting a lure related to modded applications. The presence of numerous PDF links, many hosted on free domains, indicates a potential attempt to manipulate search engine results or host malicious payloads. No scripts were extracted, but the overall structure and linked content suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://midufefew.ru/wix?keyword=toomics+mod+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408871/normal_6019b029e5e00.pdfIn PDF document text
    • http://zowutelufuga.iblogger.org/24977791144.pdfIn PDF document text
    • http://keligekixebar.22web.org/ziparenajitiwol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489251/normal_6028f86e245f4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tolejax.epizy.com/fopem.pdfIn PDF document text
    • http://vonuvaxi.epizy.com/giregesid.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/whirlpool_top_loader_washing_machine_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/tafudemezizaragawavewulu.pdfIn PDF document text
    • http://duginufolos.rf.gd/3886936564.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/77985836758.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/american_standard_furnace_red_light_blinking_2_times.pdfIn PDF document text
    • http://jimabepur.rf.gd/can_i_take_my_drivers_test_online_in_kansas.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/cash_dividends_on_balance_sheet.pdfIn PDF document text
    • http://sesulipepukaja.rf.gd/ischemic_stroke_case_study.pdfIn PDF document text
    • https://d17f4099-ecc1-42b1-9c73-51521793457c.filesusr.com/ugd/4a2613_10f7e9f2fbe946218af40fe9818c3ad3.pdf?index=trueIn PDF document text
    • https://ad323f3e-245e-4e3c-8b16-de91fefec063.filesusr.com/ugd/5ea691_85fcff93e1fe437ab8df3139ab3a3d7b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kegovev/cerebral_cavernous_venous_malformation.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/kiviseketixubako.pdfIn PDF document text
    • http://numapev.rf.gd/41129846418.pdfIn PDF document text
    • https://02314edc-d025-420b-9d62-795437f25c47.filesusr.com/ugd/4f0fc1_3478741220fc47dfac7a822483ca8b33.pdf?index=trueIn 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_off0000f1d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D6 5104 bytes
SHA-256: 04e2b3211ef0b95380c127deb3e4f6ef79d80215f8110cf27a88f79630bd984c
font_01_sfnt_off00010326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10326 10732 bytes
SHA-256: 7ef32f1f30e5dac13282000402e1cb56e5e6e575263bb65c4d5d27b8b309d840

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