Malicious PDF — malware analysis report

Static analysis result for SHA-256 97cf5c87b4ede94a…

MALICIOUS

PDF

93.4 KB Created: 2021-03-24 23:40:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 26b5471f706da463a2bc9532403be06c SHA-1: 4c432a9df14ef929c954e015f0b8791a7cd1c5b5 SHA-256: 97cf5c87b4ede94a704c46f22dce17f15d30d00d5e592d18a0ab2c6c8b42fd17
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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=biogeochemical+cycles+study+guide+answers PDF link annotation
    • https://cdn.sqhk.co/mujowofapubi/sV3EhiH/duduluviteritaz.pdfIn PDF document text
    • https://jexumaravoza.weebly.com/uploads/1/3/4/2/134265375/pegulekufatugi.pdfIn PDF document text
    • http://egrn-order.online/which_state_has_the_most_covid_cases_today43q7n.pdfIn PDF document text
    • http://italdom.fun/jaxezejaja3wv0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478950/normal_60469457c8923.pdfIn PDF document text
    • http://lyudi23.ru/5346601975xpswi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477400/normal_5fe1cf4cbd71d.pdfIn PDF document text
    • http://swiss-gear.shop/puzufiwavp6160.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472773/normal_600d5b6f1ee97.pdfIn PDF document text
    • https://balijijileg.weebly.com/uploads/1/3/4/5/134505585/zifexotikuxe_tolikiliwe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369158/normal_603b67d678d4f.pdfIn PDF document text
    • http://myfirstsite.xyz/callaway_mavrik_standard_driver_reviewzsjyr.pdfIn PDF document text
    • https://tavadubamik.weebly.com/uploads/1/3/4/4/134473349/9501408.pdfIn PDF document text
    • https://cdn.sqhk.co/mivezifov/AijBFid/tts_gen_halilintar_family_pintare.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/mexesazaxasa/employee_stock_options_for_dummies.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/algebra_1_solving_equations_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/mivotedisozurevowevenil.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/gulofase.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/how_to_say_please_and_thank_you_in_mandarin_chinese.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/boss_full_movie_free.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011dbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DBB 6440 bytes
SHA-256: 629123bfde0685c5f69bbdd27ec008bde0224d5c30af1dabb990f6ee33ea778e
font_01_sfnt_off00012daf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DAF 5596 bytes
SHA-256: 1aae64f919bca13e93111e6f717b21d9d438ebc6eb669af1f3d88f100e389fe1
font_02_sfnt_off000140a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140A3 11536 bytes
SHA-256: ef63cd03dbb91cde1e8f4bba1cd7cf15b45e18c969fb9b7e81dcc15437f1fc85

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