Malicious PDF — malware analysis report

Static analysis result for SHA-256 11ad54fb716b85f1…

MALICIOUS

PDF

79.7 KB Created: 2021-06-05 11:39:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6c1ff2606e7b856ba31aa55278faa23 SHA-1: 73eabb61f1de1ccf42013440c5380c1df8240901 SHA-256: 11ad54fb716b85f1ac6e13c469b1bcb30d96a7b71215faf92125892be49a70c6
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to a URL that appears to be part of a link farm, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains text related to job applications, reinforcing the lure. The presence of multiple external links and the ML classifier flagging it as malicious indicate a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://inwebjor.ru/pbw?utm_term=how+can+i+apply+a+job+at+walmart
    • https://cdn-cms.f-static.net/uploads/4416790/normal_60146ea8881d0.pdf
    • https://cdn-cms.f-static.net/uploads/4383128/normal_6033bff13f2ff.pdf
    • https://cdn-cms.f-static.net/uploads/4502500/normal_6056214bab964.pdf
    • https://cdn-cms.f-static.net/uploads/4470681/normal_604aa25fec86e.pdf
    • https://luliguruj.weebly.com/uploads/1/3/4/8/134879099/5115464.pdf
    • https://xibigulekin.weebly.com/uploads/1/3/0/9/130968960/remisijuguna_zopovefu_samunoligu_nabamegexoxad.pdf
    • https://cdn-cms.f-static.net/uploads/4366055/normal_6048c2bf2686a.pdf
    • https://gidedumewulo.weebly.com/uploads/1/3/5/9/135961218/9693378.pdf
    • https://cdn-cms.f-static.net/uploads/4498801/normal_605efeafea6ab.pdf
    • https://bixemasabomevis.weebly.com/uploads/1/3/4/5/134517571/dee8b4d.pdf
    • https://cdn-cms.f-static.net/uploads/4388432/normal_6033029bd128e.pdf
    • https://gazuxupoje.weebly.com/uploads/1/3/4/1/134108966/5057412.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/891b82e7-fe73-4d58-9d88-dd363a3fb493/34262637405.pdf
    • http://jolowajuwijo.pbworks.com/f/lerudala.pdf
    • https://uploads.strikinglycdn.com/files/752b013a-1283-495f-a881-32d9244a3a53/brain_and_behavior_a_cognitive_neuroscience_perspective_free.pdf
    • http://jitilabajeko.pbworks.com/f/28347125782.pdf
    • http://lomexalipele.pbworks.com/w/file/fetch/144506757/dios_invento_los_numeros.pdf
    • https://uploads.strikinglycdn.com/files/1d4cda62-bef3-4ce3-8c2e-ee2499b861f5/gokefog.pdf
    • https://uploads.strikinglycdn.com/files/1bf977f3-6f73-4b98-bc11-475b3a733148/cuales_son_los_sintomas_del_covid_asintomatico.pdf
    • http://supatibu.pbworks.com/w/file/fetch/144418833/mac_catalina_10.15_dmg.pdf
    • http://feteselulo.pbworks.com/w/file/fetch/144633414/90226625964.pdf
    • https://uploads.strikinglycdn.com/files/0723f18e-9c68-4100-a3dd-8f0257652239/presonus_audiobox_1818vsl_power_supply.pdf
    • https://uploads.strikinglycdn.com/files/8cb2de3b-167d-4cf4-ab86-d68ad79fd875/jivejuzisakexerekajijon.pdf
    • https://uploads.strikinglycdn.com/files/774b1e6c-7949-4e43-848e-b62d4c021eaf/bupixadalubuja.pdf
    • https://uploads.strikinglycdn.com/files/32eccb3d-9a3e-4f0d-aa08-07e7ef10a3ca/rarotejamuvo.pdf
    • https://uploads.strikinglycdn.com/files/5ad15e02-a565-4bae-953b-ea2332adf985/changing_active_to_passive_voice_worksheet.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebaa.bin
6a03fb165b86cbbe5150a076799c4dad3edd8ae8543bc73e59bcbe4f13e81ebe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAA 4940 bytes
font_01_sfnt_off0000fc54.bin
ea381721ec6b6819fbf34ba7978e1cc91d1169133eca35cf706f94220c0838fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC54 10784 bytes
font_02_sfnt_off00012129.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12129 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.