Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b9ddf63e36a4ad9…

MALICIOUS

PDF

80.2 KB Created: 2021-04-25 11:25:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 8dc48ee01fc3aa6d7bfac20bb4cc3132 SHA-1: 0cf98843d9f527860717637c7f5ea8aafc338ad9 SHA-256: 8b9ddf63e36a4ad9797a50b68fe4b494763b3554e08f683e6d012535f3380e38
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by heuristics as a link farm designed for SEO manipulation. The primary URL, 'https://resalured.ru/strik?utm_term=how+to+update+a+garmin+nuvi+200w', suggests a lure related to device updates, a common tactic for phishing or malware delivery. ClamAV detection and ML classification strongly indicate malicious intent, likely involving the distribution of phishing content or a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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://resalured.ru/strik?utm_term=how+to+update+a+garmin+nuvi+200w PDF link annotation
    • https://jidakizunulub.weebly.com/uploads/1/3/1/3/131381167/jidofexudo_gukuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477916/normal_604e605e80d80.pdfIn PDF document text
    • http://fudidudigas.iblogger.org/bijeda.pdfIn PDF document text
    • https://migirebunimalab.weebly.com/uploads/1/3/1/3/131383914/xinifolup-zevafakos-bamikofuguturux-lolikajazopekox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490274/normal_5fc953ceeaa5f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383566/normal_5fdcca7eb9cb4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377113/normal_6062ef53dbad6.pdfIn PDF document text
    • https://bamaxasujobuz.weebly.com/uploads/1/3/4/3/134315865/lapelewutup-mevusanefen-guzofadumi-ziwomezuti.pdfIn PDF document text
    • https://pojojozujivalim.weebly.com/uploads/1/3/1/1/131164399/sesenun-panup-fojulakawur-tabif.pdfIn PDF document text
    • https://duwiwobejul.weebly.com/uploads/1/3/2/7/132740292/terarazo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393363/normal_602a1a0a2a9d3.pdfIn PDF document text
    • http://rajibajoxitum.22web.org/zafuwakobudesomajozado.pdfIn PDF document text
    • https://furamakivagoj.weebly.com/uploads/1/3/0/8/130814247/ffb7045f119.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sobibuxasegisun.rf.gd/android_adapter_getview_return_null.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/asphalt_8_hack_android_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ff0149a-5094-4f23-aa01-2379a883ad4d/zabejabibakuterupuvazesa.pdfIn PDF document text
    • http://rixuzomobe.epizy.com/7620577313.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/lodubaragodotemuvobolon.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/85050797036.pdfIn PDF document text
    • http://dejupaxifitat.rf.gd/abc_tv_guide_utah.pdfIn PDF document text
    • https://s3.amazonaws.com/vefagotoje/how_do_you_reset_a_mini_fridge.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/sena_20s_evo_bluetooth_headset__intercom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f6187db-3fb0-4a4c-bedc-5bd6b4d57bca/xifexasoxipixasumo.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.

FilenameKindSourceSize
font_00_sfnt_off0000fbf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF8 5456 bytes
SHA-256: aae556cd2878b6a9bd431efbf7ba67a56a7519cf336db8df2d78cb6b852e20dc
font_01_sfnt_off00010e8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E8B 10784 bytes
SHA-256: cae7fa72aea6f02ac1bcba9f734632a9213a3052ab0e7b147a1d025cee50ca81