PDF malware analysis — malicious · a184d8a76b1de4e8

MALICIOUS

PDF

103.3 KB Created: 2021-03-28 00:22:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30

MD5: 526fd55336e6276a39c5bd92024b7f5e SHA-1: 5419abce9eb30f4f389eed6c685d32ba7f2c1f79 SHA-256: a184d8a76b1de4e8ec56d21b93c7573b49f60879509de33e3ef161eaa3d0269f

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The document functions as a link farm, containing numerous external URLs pointing to disposable hosting, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly indicate an attempt to redirect users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9979

Heuristics 5

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 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://xajibur.ru/award?keyword=bhakti+yoga+in+telugu+pdf PDF link annotation
- http://lamejix.scienceontheweb.net/cuidados_del_cordon_umbilical_del_recien_nacido.pdfIn PDF document text
- https://cdn.sqhk.co/lokiwejawe/cFXicjg/71902496382.pdfIn PDF document text
- https://cdn.sqhk.co/nosimasiv/jajaqif/candy_crush_saga_cookies.pdfIn PDF document text
- https://cdn.sqhk.co/ruselaguzoda/fjajdLA/60538263416.pdfIn PDF document text
- http://fusekimutoxi.sportsontheweb.net/38666254459.pdfIn PDF document text
- http://tehnoprom.org/12409677568wb0au.pdfIn PDF document text
- http://pinopizo.sportsontheweb.net/doturanubitilitanuzo.pdfIn PDF document text
- http://community-day.ru/41068221748so5rw.pdfIn PDF document text
- http://lyudi23.ru/multiplication_rule_for_square_rootss8ef1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4490269/normal_5fe7cdde3a8fc.pdfIn PDF document text
- http://creditpm.com/97461315056vamv4.pdfIn PDF document text
- http://gaydating.world/racing_simulator_steering_wheel_stand_for_ps44aa1q.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4380380/normal_6001ebb115830.pdfIn PDF document text
- http://mapugukabazewu.scienceontheweb.net/koronus_bestiary.pdfIn PDF document text
- http://trysalon.xyz/three_billy_goats_gruff_trollhi0jo.pdfIn PDF document text
- https://cdn.sqhk.co/tasaxasup/o8jfjf7/28366176065.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4389084/normal_603c4ca6370e3.pdfIn PDF document text
- http://pawomodom.medianewsonline.com/30138182731.pdfIn PDF document text
- http://finansi-7.online/onkyo_tx-nr525_manualq9a7s.pdfIn PDF document text
- http://dololebajug.scienceontheweb.net/47880914437.pdfIn PDF document text
- http://vehicleinsusa.com/jozaguzimimedajowati7vuk8.pdfIn PDF document text
- http://optalpha.com/how_to_download_ms_visio_20137ipfj.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://fedorahosted.org/lohitIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- http://jasunusemoki.onlinewebshop.net/how_to_describe_sunset_in_word.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f3cf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF3CF	5128 bytes
SHA-256: `98c93a91cc5b64b695af42f1466a65730039a819fe0edc2ae7c489ee54d57bf2`
`font_01_sfnt_off00010546.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10546	44108 bytes
SHA-256: `3cb66eacc83f5334e3fe4bc44241fcae71d44682cb9097587c14c992bbb2bb24`
`font_02_sfnt_off00015a2f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15A2F	10872 bytes
SHA-256: `1a2e8357a7a192f97f759cf77b07e9dc037948beb730880a7dc67f94f9dac601`
`font_03_sfnt_off00017f58.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x17F58	4324 bytes
SHA-256: `1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e`

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