Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5b7e6e5522ac07b…

MALICIOUS

PDF

74.8 KB Created: 2021-05-07 07:40:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 12ae8d894e93cc6700d29a4ed8b75a1c SHA-1: 0b7a10c63220c0e854f04f6bb1a274e8012d9dc0 SHA-256: f5b7e6e5522ac07b564ae6e39b03e93b58f8abad643b9d1957114ed9dc64535a
156 Risk Score

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 0.9996

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://gimoguvi.ru/strik?utm_term=how+to+pair+a+logitech+unifying+receiver PDF link annotation
    • https://xitagagumirowe.weebly.com/uploads/1/3/4/3/134346856/malegilovonu.pdfIn PDF document text
    • https://jawetixadal.weebly.com/uploads/1/3/1/6/131606755/5759174.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/CeW8Yie/rimidozilitimonofitiga.pdfIn PDF document text
    • http://raponikidosal.getenjoyment.net/xokiruze.pdfIn PDF document text
    • https://cdn.sqhk.co/jogowijalaro/iajgiil/ludo_3d_multiplayer_mod_apk.pdfIn PDF document text
    • http://jokojujut.medianewsonline.com/application_for_employment_sample.pdfIn PDF document text
    • https://cdn.sqhk.co/zifeduwa/gvgenPl/votojijuwepenawawafop.pdfIn PDF document text
    • https://dobuwejakunarek.weebly.com/uploads/1/3/4/7/134772316/4903048.pdfIn PDF document text
    • https://cdn.sqhk.co/bexefoboxevi/o9Wgg7A/download_tip_tap_soccer_mod_apk_unlimited_money.pdfIn PDF document text
    • https://cdn.sqhk.co/bigulikexupa/jeijdje/boom_beach_statues_hack.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/e0b5c8aa.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/kavifunaruvi/75025234574.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/79087248155.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/nj_workers_comp_adjournment_request_form.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/bimow.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/british_guidelines_for_asthma_management.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/abdominal_trauma_guidelines_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/42919005970.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/how_to_adjust_temperature_on_a_rheem_hot_water_heater.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/basomot.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/96875944079.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/airlift_performance_3p_golf_7.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A7 5312 bytes
SHA-256: e8b655374bb534048072150dc9889ce71542f65ffef45b3d78e85df55746a398
font_01_sfnt_off0000f5d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D8 11684 bytes
SHA-256: f3b9e5337598e6029ff3281301627f5886fde41af6568d11b214b7242b01df54

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