PDF malware analysis — malicious · cbb9132617add75d

MALICIOUS

PDF

81.6 KB Created: 2021-04-04 23:48:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: ae2901076eabf8f92ee98653ab574aed SHA-1: c484ad2a7a81df3c1b4f695ea5a8d963fa56b335 SHA-256: cbb9132617add75d5db29d402bf451c89960112b67b6045442f7f61e83fd1ea8

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The presence of numerous external URIs, many hosted on disposable domains and employing UTM parameters, strongly suggests a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains references to game save files, indicating a lure to entice downloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 6

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://jottigo.ru/123?utm_term=asphalt+8+100+completed+save+file+android PDF link annotation
- http://effektzhizni.ru/exercise_23_special_senses_anatomy_of_the_visual_system_review_sheetowkgi.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4501482/normal_5fe95f2493335.pdfIn PDF document text
- http://zahlungsservice-ch.site/what_is_the_scientific_definition_of_mitochondriai3fpt.pdfIn PDF document text
- https://kukiramofup.weebly.com/uploads/1/3/1/4/131413837/8ea92.pdfIn PDF document text
- https://tekerigaxigo.weebly.com/uploads/1/3/4/7/134702693/zixibavo.pdfIn PDF document text
- http://hookup153.site/62432099788x52au.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4374715/normal_603cf4af82f31.pdfIn PDF document text
- http://startbastar.online/yin_yoga_poses_sequencedw2o5.pdfIn PDF document text
- http://magnifioco.site/71433895530r1m89.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/bd36e8fc-1d38-4686-83d7-57d461282dc3/baxinezubujubixobik.pdfIn PDF document text
- https://s3.amazonaws.com/dowadotiju/tuwebudulavarubev.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f6d862f6-1116-4954-b785-5a426916cb7c/moccamaster_by_technivorm_kbgv_select_coffee_maker_canada.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0df910a5-0ecf-4244-b882-9dcf146d2e4e/the_childrens_book_of_virtues_free.pdfIn PDF document text
- https://s3.amazonaws.com/kudufigunabi/micro_center_return_policy_restocking_fee.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/22d70007-25d0-499e-bf46-c347fa774e65/the_fall_of_jake_paul_song.pdfIn PDF document text
- https://s3.amazonaws.com/kalanejaxutilif/49066808850.pdfIn PDF document text
- https://s3.amazonaws.com/xanunafojuloki/go_math_book_answers_grade_8.pdfIn PDF document text
- https://s3.amazonaws.com/rojalexipokadaz/mulusebikor.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e8da.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE8DA	5832 bytes
SHA-256: `da32bd974967a8840f80ab4580e36ce6ad39141eb49f0a43de4ccf28cd71407e`
`font_01_sfnt_off0000fc9c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC9C	11184 bytes
SHA-256: `0acdd0c42d0850421c607700edc86e1e1547a7d3c8791f5bdbc64747dfb8e122`
`font_02_sfnt_off0001230b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1230B	16204 bytes
SHA-256: `532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e`

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