Malicious PDF — malware analysis report

Static analysis result for SHA-256 80c96ef0c763d43a…

MALICIOUS

PDF

69.4 KB Created: 2021-02-25 16:21:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1308b55ecc1a176b71949b7e87efefaa SHA-1: 8de6ce9046cb113b37ea9d8055170a1c1e2449ef SHA-256: 80c96ef0c763d43a894a6a8078a50cb157913688e74810afafb40c12199ca01b
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many of which point to other PDF files hosted on disposable or suspicious domains. This behavior is indicative of a link farm, often used for SEO manipulation or to distribute further malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://crophysi.ru/aws?utm_term=rode+videomic+pro+shock+bands PDF link annotation
    • http://gadetebes.sportsontheweb.net/xavununobedamawuse.pdfIn PDF document text
    • https://cdn.sqhk.co/gufemazibafi/hhWk5gh/zawomexinerusufiwijo.pdfIn PDF document text
    • http://chebsvet.ru/ninuritemefafakefeonv3u.pdfIn PDF document text
    • https://cdn.sqhk.co/diduwuposenu/9W9jjia/candy_smash_mania_2019_mod_apk.pdfIn PDF document text
    • http://dosaxixapaxa.medianewsonline.com/kawobotarolejof.pdfIn PDF document text
    • https://cdn.sqhk.co/xulawajikigi/bAhdAv2/acrylic_nail_art_kit_for_beginners.pdfIn PDF document text
    • http://xiwakaravivomik.scienceontheweb.net/soposuludap.pdfIn PDF document text
    • http://idem-peshkom.ru/html_to_api_githubzxwll.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/d5YDggG/amc_24_palm.pdfIn PDF document text
    • https://durabaseduxoj.weebly.com/uploads/1/3/4/2/134235759/zeninunelewu.pdfIn PDF document text
    • http://maykistore.ru/jazuvuguginiq5ogo.pdfIn PDF document text
    • https://cdn.sqhk.co/wafavalufa/jiohdDN/local_weather_mars_pa.pdfIn PDF document text
    • https://cdn.sqhk.co/nasanoroge/5ahjvgg/dirt_rally_2._0_ts-_pc_racer_settings.pdfIn PDF document text
    • http://bosnoslovnoejelaniekupit.xyz/cisco_autonomous_access_point_multicastz7p02.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/nijudow/zimugejano.pdfIn PDF document text
    • http://gipebevu.atwebpages.com/64727914285.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/bluetooth_for_android_tablet_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
    • 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_off0000d455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD455 5552 bytes
SHA-256: 63c31581c1aae141435d52f6e014ef3ca75ba89de1524407b2b360bcb806678c
font_01_sfnt_off0000e70b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE70B 9732 bytes
SHA-256: 1483d7e7047676fb04b5b6aba6a4158fbb416a5bc9f46b8565d1135cf16637b6

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