PDF malware analysis — malicious · 2ba176a55f82f7e2

MALICIOUS

PDF

81.5 KB Created: 2021-04-06 09:08:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02

MD5: 25f79ec2b586e78afc6053a2b0bcf71a SHA-1: 0631140ad5fdc1f28cdaaca8125e18453c697a54 SHA-256: 2ba176a55f82f7e2daebe0c92e34c10d482c15242c376cbe3809386150fc7408

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or SEO spamming technique. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

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 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.
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://vilenefex.ru/aws?utm_term=grove+manlift+dealer PDF link annotation
- https://cdn-cms.f-static.net/uploads/4490929/normal_60329aaa71e1f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4483361/normal_603d123712992.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4446045/normal_60104682280b8.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4423428/normal_5fec3deb47759.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4424985/normal_5fd139649d071.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4381978/normal_5fdff3af8dbdd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4414851/normal_600c7ec4b51d7.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4416935/normal_605c0cea7d48d.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://s3.amazonaws.com/geraromu/cast_android_screen_to_pc_through_usb.pdfIn PDF document text
- https://692937ca-140d-46b9-9715-018e108c1018.filesusr.com/ugd/2540a5_7b3669a45c744a3093f7b60a0b8e7e6b.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/vojapu/arya_2004_songs_naa_songs.pdfIn PDF document text
- https://s3.amazonaws.com/vibuvomomuv/the_expanse_season_5_episode_7_cast.pdfIn PDF document text
- https://bcbc83ff-a82b-4234-bf1d-c69e8cae54d5.filesusr.com/ugd/057c82_a9636b35bb4e43198d4fabd37c87cfc6.pdf?index=trueIn PDF document text
- https://331e17ce-4321-42a7-89aa-067eaa3daeeb.filesusr.com/ugd/6576ad_47cc623033ee4cdea9231e8215445468.pdf?index=trueIn PDF document text
- https://b4140449-9b96-4148-8619-c9b3eed7b48c.filesusr.com/ugd/c33cdb_04e9c43214524ae18aa89fef884750fb.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/vuxalirudidel/rojupibewodugovitapo.pdfIn PDF document text
- https://s3.amazonaws.com/lebaxa/equivalencia_pulgadas_mm_tuberas_polietileno.pdfIn PDF document text
- https://s3.amazonaws.com/girilifawuxi/wijubamuxumafevakexuj.pdfIn PDF document text
- https://s3.amazonaws.com/bovenotojitowe/zolevesobufejovodulemebed.pdfIn PDF document text
- https://s3.amazonaws.com/selivuvumepaveb/how_to_reset_air_conditioner_universal_remote_control.pdfIn PDF document text
- https://580b68e3-2104-4118-ae5b-4f285de1c062.filesusr.com/ugd/dad7b5_4aa3cf8173ef469cb3a311f6b528bcc3.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/lijulijowivaze/complaint_letter_template_late_delivery.pdfIn PDF document text
- https://s3.amazonaws.com/xukonakefules/bum_simulator_pc_free.pdfIn PDF document text
- https://1fd079ea-3156-4ae8-a0b4-6153e0b529c5.filesusr.com/ugd/e66bf7_1ff504695e1e47b2bda1722816313c59.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f04e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF04E	4752 bytes
SHA-256: `82a4ae63880f2491dfd6381e851e4a38d7d044531884fc7aa5d473318c466a0c`
`font_01_sfnt_off0001005d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1005D	12140 bytes
SHA-256: `c4d66f08c42407802931fb69bc3d9adc986ee1150cb6c05a266e8265fdc10647`
`font_02_sfnt_off000128ef.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x128EF	4324 bytes
SHA-256: `0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333`

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