Malicious PDF — malware analysis report

Static analysis result for SHA-256 e29f7171af7c118c…

MALICIOUS

PDF

82.3 KB Created: 2021-03-17 23:24:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: c40e194af313b60570d96d003bda78f8 SHA-1: 107ab01857ec2fac973e4f489ec0ddae98fc906c SHA-256: e29f7171af7c118c8115ffec7a33649b7173a5362c9a5f7b3811ed7bf42602bc
186 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO abuse tactic to distribute malicious content. The document body, though heavily obfuscated, appears to contain keywords related to recipes, likely as a lure. No scripts were extracted, but the PDF structure itself facilitates the redirection to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jottigo.ru/wix?keyword=recetas+ecuatorianas+laylita PDF link annotation
    • https://mulokigapasol.weebly.com/uploads/1/3/1/0/131070847/8202227.pdfIn PDF document text
    • https://cdn.sqhk.co/belesobikezi/e8ihhco/big_head_basketball_unblocked_hacked.pdfIn PDF document text
    • https://genezekanoz.weebly.com/uploads/1/3/1/4/131413678/b4f43.pdfIn PDF document text
    • https://gusefokujugox.weebly.com/uploads/1/3/4/0/134040973/zugezipefe.pdfIn PDF document text
    • https://cdn.sqhk.co/gowamojon/phfhOhh/lodirotagasifimad.pdfIn PDF document text
    • http://nemugub.mywebcommunity.org/ragasujegepu.pdfIn PDF document text
    • http://dizititakozazi.mywebcommunity.org/star_wars_death_star_levitating_bluetooth_speaker.pdfIn PDF document text
    • https://cdn.sqhk.co/dojaxeje/ihdlksc/89979653949.pdfIn PDF document text
    • https://wozepunelom.weebly.com/uploads/1/3/5/9/135993859/678c2e0df1.pdfIn PDF document text
    • https://gavurefeg.weebly.com/uploads/1/3/1/0/131070452/dofafififulusisixeve.pdfIn PDF document text
    • https://cdn.sqhk.co/giwerezekobe/eTVJigo/dental_office_administrative_assistant_job_description.pdfIn PDF document text
    • https://cdn.sqhk.co/jebanufebejo/hhfMidX/axe_alliance_vs_empire_classes.pdfIn PDF document text
    • https://tagesokute.weebly.com/uploads/1/3/5/3/135315496/0e553d5be16a6a.pdfIn PDF document text
    • https://bosofivi.weebly.com/uploads/1/3/4/6/134668799/nefix_ravugejaje_retupikimotu_kebowovukal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://c31d65df-273c-4bcc-acfb-7b03b0724b99.filesusr.com/ugd/e7e4a0_104f4a92fa3043abb4ac08b502f9146d.pdf?index=trueIn PDF document text
    • http://zobuwijezad.onlinewebshop.net/muvifes.pdfIn PDF document text
    • http://doriponesarom.myartsonline.com/will_a_1500_watt_inverter_run_a_900_watt_microwave.pdfIn PDF document text
    • https://95fbbc11-640f-4658-acdf-6e09da746871.filesusr.com/ugd/e42ee3_dc560e5c26f245918187188c5e1c8310.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/34c6d8fc-470d-483d-b8c2-9febb3154579/nekanelasizipezatijinukok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4026351-1968-4c9e-a017-c3b87a5aa485/which_is_the_best_george_foreman_grill_to_buy.pdfIn PDF document text
    • http://butorinowu.myartsonline.com/16370629501.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0E 4784 bytes
SHA-256: 097de98f15561ed59771cf2b6b455ef0c84a7fa5e32f10e5849c967f38e51736
font_01_sfnt_off0000ff5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5F 14544 bytes
SHA-256: 5c06a3e34e084fa48fc9cb9bac854483ea16e0c7d0ba3220f4d3a668315e6df7
font_02_sfnt_off00012c29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C29 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2