PDF malware analysis — malicious · 0577bf9683af40d6

MALICIOUS

PDF

78.2 KB Created: 2021-03-01 02:48:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13

MD5: e5cc02db2085b6f1ec08ac25f23b72e6 SHA-1: 25a1abf930eae8a0c3095de825b313f51a1f861e SHA-256: 0577bf9683af40d6010676a838adb59ca4b985e3e0a3aac31de84ed16134fdcd

244 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to disposable domains and redirectors, indicating a link farm or phishing campaign. The ClamAV detection and ML classifier further support its malicious nature. The embedded URLs are likely used to redirect users to malicious sites for credential harvesting or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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.
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://crophysi.ru/123?utm_term=delonghi+portable+air+conditioner+manual+pac+an125hpec In PDF document text
- http://1xbet-football.fun/not_driving_car_during_covidlmpfv.pdfIn PDF document text
- https://fosobezi.weebly.com/uploads/1/3/4/8/134898374/koxigukijifu.pdfIn PDF document text
- https://wenezobu.weebly.com/uploads/1/3/4/6/134625155/romejivuwiv.pdfIn PDF document text
- http://fishing-rods2.club/organizational_culture_lecture_notescetbn.pdfIn PDF document text
- http://tonedomopoja.scienceontheweb.net/white_fang_of_the_leaf_sword.pdfIn PDF document text
- https://sepuzudagek.weebly.com/uploads/1/3/5/3/135329554/pamonimefilabod_lomazutegovote.pdfIn PDF document text
- http://uaportal.site/k_konu_anlatmsp9q9.pdfIn PDF document text
- http://like-store.site/warframe_dojo_layoutpzipm.pdfIn PDF document text
- https://jomimufigaz.weebly.com/uploads/1/3/4/3/134319247/9664971.pdfIn PDF document text
- http://saluzoz.iblogger.org/98993476540.pdfIn PDF document text
- http://gejesixave.scienceontheweb.net/lange_psychiatry_10th.pdfIn PDF document text
- http://nijalatol.mypressonline.com/h81m-p33_audio_driver.pdfIn PDF document text
- http://lomigakorak.getenjoyment.net/powermatic_2_electric_cigarette_injector_machine_for_sale.pdfIn PDF document text
- https://manobafezelibo.weebly.com/uploads/1/3/1/6/131636879/2618833.pdfIn PDF document text
- https://devigejijakefu.weebly.com/uploads/1/3/2/7/132740662/45df59.pdfIn PDF document text
- https://bopugokux.weebly.com/uploads/1/3/4/9/134901566/82d66fa145.pdfIn PDF document text
- http://gitutemove.iblogger.org/sonudagidakinakukexeruw.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://tokafibalo.epizy.com/tetojufofojibiliro.pdfIn PDF document text
- https://s3.amazonaws.com/ninasivol/roruj.pdfIn PDF document text
- http://kutubuge.rf.gd/62419983175.pdfIn PDF document text
- https://s3.amazonaws.com/fowonaxul/school_uniforms_ontario_canada.pdfIn PDF document text
- https://s3.amazonaws.com/wejuvono/universal_adb_android_usb_driver_installer.pdfIn PDF document text
- https://s3.amazonaws.com/joterige/38658969158.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000efb6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFB6	5756 bytes
SHA-256: `b36cc965efd796c3ed0b73aed036d3538f5bdc2749c5b6eb0eb9f3b8e4fd53a5`
`font_01_sfnt_off0001031f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1031F	11580 bytes
SHA-256: `a812e62d92072093528fca383ac4837e27a799339b583f059f1bb852399b7d53`

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